139427757 has 64 divisors (see below), whose sum is σ = 254822400. Its totient is φ = 73560960.

The previous prime is 139427753. The next prime is 139427767. The reversal of 139427757 is 757724931.

It is not a de Polignac number, because 139427757 - 2² = 139427753 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139427753) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 146758 + ... + 147704.

It is an arithmetic number, because the mean of its divisors is an integer number (3981600).

Almost surely, 2^139427757 is an apocalyptic number.

It is an amenable number.

139427757 is a deficient number, since it is larger than the sum of its proper divisors (115394643).

139427757 is a wasteful number, since it uses less digits than its factorization.

139427757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023 (or 1017 counting only the distinct ones).

The product of its digits is 370440, while the sum is 45.

The square root of 139427757 is about 11807.9531249070. The cubic root of 139427757 is about 518.5409754088.

The spelling of 139427757 in words is "one hundred thirty-nine million, four hundred twenty-seven thousand, seven hundred fifty-seven".