999977000 has 64 divisors (see below), whose sum is σ = 2552696640. Its totient is φ = 363624000.

The previous prime is 999976979. The next prime is 999977021. The reversal of 999977000 is 779999.

It is an interprime number because it is at equal distance from previous prime (999976979) and next prime (999977021).

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 999977000.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34454 + ... + 56453.

It is an arithmetic number, because the mean of its divisors is an integer number (39885885).

Almost surely, 2^999977000 is an apocalyptic number.

It is an amenable number.

999977000 is an abundant number, since it is smaller than the sum of its proper divisors (1552719640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

999977000 is a wasteful number, since it uses less digits than its factorization.

999977000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90939 (or 90925 counting only the distinct ones).

The product of its (nonzero) digits is 321489, while the sum is 50.

The square root of 999977000 is about 31622.4129376618. The cubic root of 999977000 is about 999.9923332746.

The spelling of 999977000 in words is "nine hundred ninety-nine million, nine hundred seventy-seven thousand".