99812961 has 12 divisors (see below), whose sum is σ = 145276560. Its totient is φ = 66033240.

The previous prime is 99812957. The next prime is 99812987. The reversal of 99812961 is 16921899.

It is not a de Polignac number, because 99812961 - 2² = 99812957 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99812941) 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 11 ways as a sum of consecutive naturals, for example, 41151 + ... + 43508.

It is an arithmetic number, because the mean of its divisors is an integer number (12106380).

Almost surely, 2^99812961 is an apocalyptic number.

It is an amenable number.

99812961 is a deficient number, since it is larger than the sum of its proper divisors (45463599).

99812961 is a wasteful number, since it uses less digits than its factorization.

99812961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84796 (or 84793 counting only the distinct ones).

The product of its digits is 69984, while the sum is 45.

The square root of 99812961 is about 9990.6436729572. The cubic root of 99812961 is about 463.8693167074.

The spelling of 99812961 in words is "ninety-nine million, eight hundred twelve thousand, nine hundred sixty-one".