977994686 has 8 divisors (see below), whose sum is σ = 1476707664. Its totient is φ = 485758800.

The previous prime is 977994671. The next prime is 977994691. The reversal of 977994686 is 686499779.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1618895 + ... + 1619498.

It is an arithmetic number, because the mean of its divisors is an integer number (184588458).

Almost surely, 2^977994686 is an apocalyptic number.

977994686 is a deficient number, since it is larger than the sum of its proper divisors (498712978).

977994686 is a wasteful number, since it uses less digits than its factorization.

977994686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3238546.

The product of its digits is 41150592, while the sum is 65.

The square root of 977994686 is about 31272.9065806170. The cubic root of 977994686 is about 992.6104240046.

The spelling of 977994686 in words is "nine hundred seventy-seven million, nine hundred ninety-four thousand, six hundred eighty-six".