99111961 has 32 divisors (see below), whose sum is σ = 117210240. Its totient is φ = 83026944.

The previous prime is 99111949. The next prime is 99111967. The reversal of 99111961 is 16911199.

It is not a de Polignac number, because 99111961 - 2¹³ = 99103769 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99111961.

It is not an unprimeable number, because it can be changed into a prime (99111967) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 877041 + ... + 877153.

It is an arithmetic number, because the mean of its divisors is an integer number (3662820).

Almost surely, 2^99111961 is an apocalyptic number.

It is an amenable number.

99111961 is a deficient number, since it is larger than the sum of its proper divisors (18098279).

99111961 is a wasteful number, since it uses less digits than its factorization.

99111961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265.

The product of its digits is 4374, while the sum is 37.

The square root of 99111961 is about 9955.4990331977. The cubic root of 99111961 is about 462.7808254092.

The spelling of 99111961 in words is "ninety-nine million, one hundred eleven thousand, nine hundred sixty-one".