687492403 has 8 divisors (see below), whose sum is σ = 749297808. Its totient is φ = 626961504.

The previous prime is 687492401. The next prime is 687492419. The reversal of 687492403 is 304294786.

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

It is not a de Polignac number, because 687492403 - 2¹ = 687492401 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 687492403.

It is not an unprimeable number, because it can be changed into a prime (687492401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 317500 + ... + 319657.

It is an arithmetic number, because the mean of its divisors is an integer number (93662226).

Almost surely, 2^687492403 is an apocalyptic number.

687492403 is a deficient number, since it is larger than the sum of its proper divisors (61805405).

687492403 is a wasteful number, since it uses less digits than its factorization.

687492403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637253.

The product of its (nonzero) digits is 290304, while the sum is 43.

The square root of 687492403 is about 26220.0763347478. The cubic root of 687492403 is about 882.5838329036.

The spelling of 687492403 in words is "six hundred eighty-seven million, four hundred ninety-two thousand, four hundred three".