139116645 has 12 divisors (see below), whose sum is σ = 241135596. Its totient is φ = 74195520.

The previous prime is 139116643. The next prime is 139116647. The reversal of 139116645 is 546611931.

139116645 is a `hidden beast` number, since 1 + 3 + 9 + 1 + 1 + 6 + 645 = 666.

It is an interprime number because it is at equal distance from previous prime (139116643) and next prime (139116647).

It can be written as a sum of positive squares in 2 ways, for example, as 30935844 + 108180801 = 5562^2 + 10401^2 .

It is not a de Polignac number, because 139116645 - 2¹ = 139116643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139116643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1545696 + ... + 1545785.

It is an arithmetic number, because the mean of its divisors is an integer number (20094633).

Almost surely, 2^139116645 is an apocalyptic number.

139116645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

139116645 is a deficient number, since it is larger than the sum of its proper divisors (102018951).

139116645 is a wasteful number, since it uses less digits than its factorization.

139116645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3091492 (or 3091489 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 139116645 is about 11794.7719350567. The cubic root of 139116645 is about 518.1550062095.

The spelling of 139116645 in words is "one hundred thirty-nine million, one hundred sixteen thousand, six hundred forty-five".