99919956 has 24 divisors (see below), whose sum is σ = 234499104. Its totient is φ = 33113440.

The previous prime is 99919951. The next prime is 99919957. The reversal of 99919956 is 65991999.

It is a junction number, because it is equal to n+sod(n) for n = 99919896 and 99919905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99919951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21990 + ... + 26141.

It is an arithmetic number, because the mean of its divisors is an integer number (9770796).

Almost surely, 2^99919956 is an apocalyptic number.

It is an amenable number.

99919956 is an abundant number, since it is smaller than the sum of its proper divisors (134579148).

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

99919956 is a wasteful number, since it uses less digits than its factorization.

99919956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48311 (or 48309 counting only the distinct ones).

The product of its digits is 1771470, while the sum is 57.

The square root of 99919956 is about 9995.9969987991. The cubic root of 99919956 is about 464.0350065245.

The spelling of 99919956 in words is "ninety-nine million, nine hundred nineteen thousand, nine hundred fifty-six".