100999956 has 12 divisors (see below), whose sum is σ = 235666592. Its totient is φ = 33666648.

The previous prime is 100999949. The next prime is 100999979. The reversal of 100999956 is 659999001.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×100999956² = 20401982224003872, which contains 22 as substring.

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, 4208320 + ... + 4208343.

Almost surely, 2^100999956 is an apocalyptic number.

It is an amenable number.

100999956 is an abundant number, since it is smaller than the sum of its proper divisors (134666636).

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

100999956 is a wasteful number, since it uses less digits than its factorization.

100999956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8416670 (or 8416668 counting only the distinct ones).

The product of its (nonzero) digits is 196830, while the sum is 48.

The square root of 100999956 is about 10049.8734320388. The cubic root of 100999956 is about 465.7008831538.

The spelling of 100999956 in words is "one hundred million, nine hundred ninety-nine thousand, nine hundred fifty-six".