139434885 has 16 divisors (see below), whose sum is σ = 247884480. Its totient is φ = 74365200.

The previous prime is 139434859. The next prime is 139434913. The reversal of 139434885 is 588434931.

139434885 is a `hidden beast` number, since 139 + 434 + 8 + 85 = 666.

139434885 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 139434885 - 2¹¹ = 139432837 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 139434885.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 516291 + ... + 516560.

It is an arithmetic number, because the mean of its divisors is an integer number (15492780).

Almost surely, 2^139434885 is an apocalyptic number.

139434885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

139434885 is a deficient number, since it is larger than the sum of its proper divisors (108449595).

139434885 is a wasteful number, since it uses less digits than its factorization.

139434885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1032865 (or 1032859 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 139434885 is about 11808.2549515159. The cubic root of 139434885 is about 518.5498117581.

The spelling of 139434885 in words is "one hundred thirty-nine million, four hundred thirty-four thousand, eight hundred eighty-five".