100997864 has 32 divisors (see below), whose sum is σ = 212176800. Its totient is φ = 44665920.

The previous prime is 100997857. The next prime is 100997891. The reversal of 100997864 is 468799001.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12254 + ... + 18765.

It is an arithmetic number, because the mean of its divisors is an integer number (6630525).

Almost surely, 2^100997864 is an apocalyptic number.

It is an amenable number.

100997864 is an abundant number, since it is smaller than the sum of its proper divisors (111178936).

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

100997864 is a wasteful number, since it uses less digits than its factorization.

100997864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31073 (or 31069 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 100997864 is about 10049.7693505871. The cubic root of 100997864 is about 465.6976677961.

The spelling of 100997864 in words is "one hundred million, nine hundred ninety-seven thousand, eight hundred sixty-four".