99977956 has 24 divisors (see below), whose sum is σ = 189916160. Its totient is φ = 45777312.

The previous prime is 99977923. The next prime is 99977989. The reversal of 99977956 is 65977999.

It is an interprime number because it is at equal distance from previous prime (99977923) and next prime (99977989).

It is a junction number, because it is equal to n+sod(n) for n = 99977894 and 99977903.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 966 + ... + 14173.

Almost surely, 2^99977956 is an apocalyptic number.

It is an amenable number.

99977956 is a deficient number, since it is larger than the sum of its proper divisors (89938204).

99977956 is a wasteful number, since it uses less digits than its factorization.

99977956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15283 (or 15281 counting only the distinct ones).

The product of its digits is 9644670, while the sum is 61.

The square root of 99977956 is about 9998.8977392511. The cubic root of 99977956 is about 464.1247744601.

The spelling of 99977956 in words is "ninety-nine million, nine hundred seventy-seven thousand, nine hundred fifty-six".