139687557 has 8 divisors (see below), whose sum is σ = 186381120. Its totient is φ = 93059520.

The previous prime is 139687523. The next prime is 139687567. The reversal of 139687557 is 755786931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 139687557 - 2¹⁸ = 139425413 is a prime.

It is a super-2 number, since 2×139687557² = 39025227161256498, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139687517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11169 + ... + 20102.

It is an arithmetic number, because the mean of its divisors is an integer number (23297640).

Almost surely, 2^139687557 is an apocalyptic number.

It is an amenable number.

139687557 is a deficient number, since it is larger than the sum of its proper divisors (46693563).

139687557 is a wasteful number, since it uses less digits than its factorization.

139687557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32763.

The product of its digits is 1587600, while the sum is 51.

The square root of 139687557 is about 11818.9490649550. The cubic root of 139687557 is about 518.8628466553.

The spelling of 139687557 in words is "one hundred thirty-nine million, six hundred eighty-seven thousand, five hundred fifty-seven".