99919892 has 6 divisors (see below), whose sum is σ = 174859818. Its totient is φ = 49959944.

The previous prime is 99919873. The next prime is 99919901. The reversal of 99919892 is 29891999.

It can be written as a sum of positive squares in only one way, i.e., 75968656 + 23951236 = 8716^2 + 4894^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12489983 + ... + 12489990.

It is an arithmetic number, because the mean of its divisors is an integer number (29143303).

Almost surely, 2^99919892 is an apocalyptic number.

It is an amenable number.

99919892 is a deficient number, since it is larger than the sum of its proper divisors (74939926).

99919892 is a wasteful number, since it uses less digits than its factorization.

99919892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24979977 (or 24979975 counting only the distinct ones).

The product of its digits is 944784, while the sum is 56.

The square root of 99919892 is about 9995.9937975171. The cubic root of 99919892 is about 464.0349074511.

The spelling of 99919892 in words is "ninety-nine million, nine hundred nineteen thousand, eight hundred ninety-two".