139625685 has 12 divisors (see below), whose sum is σ = 242017932. Its totient is φ = 74467008.

The previous prime is 139625677. The next prime is 139625693. The reversal of 139625685 is 586526931.

139625685 is a `hidden beast` number, since 1 + 396 + 256 + 8 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (139625677) and next prime (139625693).

It can be written as a sum of positive squares in 2 ways, for example, as 39765636 + 99860049 = 6306^2 + 9993^2 .

It is not a de Polignac number, because 139625685 - 2³ = 139625677 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 3102793 = 139625685 / (1 + 3 + 9 + 6 + 2 + 5 + 6 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 139625685.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1551352 + ... + 1551441.

It is an arithmetic number, because the mean of its divisors is an integer number (20168161).

Almost surely, 2^139625685 is an apocalyptic number.

139625685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

139625685 is a deficient number, since it is larger than the sum of its proper divisors (102392247).

139625685 is a wasteful number, since it uses less digits than its factorization.

139625685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3102804 (or 3102801 counting only the distinct ones).

The product of its digits is 388800, while the sum is 45.

The square root of 139625685 is about 11816.3312834399. The cubic root of 139625685 is about 518.7862284661.

The spelling of 139625685 in words is "one hundred thirty-nine million, six hundred twenty-five thousand, six hundred eighty-five".