686932894 has 8 divisors (see below), whose sum is σ = 1049841000. Its totient is φ = 336985896.

The previous prime is 686932891. The next prime is 686932907. The reversal of 686932894 is 498239686.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686932891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3240144 + ... + 3240355.

It is an arithmetic number, because the mean of its divisors is an integer number (131230125).

Almost surely, 2^686932894 is an apocalyptic number.

686932894 is a deficient number, since it is larger than the sum of its proper divisors (362908106).

686932894 is a wasteful number, since it uses less digits than its factorization.

686932894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6480554.

The product of its digits is 4478976, while the sum is 55.

The square root of 686932894 is about 26209.4046861046. The cubic root of 686932894 is about 882.3443405020.

The spelling of 686932894 in words is "six hundred eighty-six million, nine hundred thirty-two thousand, eight hundred ninety-four".