687429537 has 16 divisors (see below), whose sum is σ = 932321280. Its totient is φ = 450479232.

The previous prime is 687429499. The next prime is 687429541. The reversal of 687429537 is 735924786.

It is not a de Polignac number, because 687429537 - 2¹² = 687425441 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 687429537.

It is not an unprimeable number, because it can be changed into a prime (687429637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33253 + ... + 49805.

It is an arithmetic number, because the mean of its divisors is an integer number (58270080).

Almost surely, 2^687429537 is an apocalyptic number.

It is an amenable number.

687429537 is a deficient number, since it is larger than the sum of its proper divisors (244891743).

687429537 is a wasteful number, since it uses less digits than its factorization.

687429537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16792.

The product of its digits is 2540160, while the sum is 51.

The square root of 687429537 is about 26218.8774931346. The cubic root of 687429537 is about 882.5569302032.

The spelling of 687429537 in words is "six hundred eighty-seven million, four hundred twenty-nine thousand, five hundred thirty-seven".