99915929 has 2 divisors, whose sum is σ = 99915930. Its totient is φ = 99915928.

The previous prime is 99915877. The next prime is 99915931. The reversal of 99915929 is 92951999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73496329 + 26419600 = 8573^2 + 5140^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99915929 is a prime.

Together with 99915931, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99915029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49957964 + 49957965.

It is an arithmetic number, because the mean of its divisors is an integer number (49957965).

Almost surely, 2^99915929 is an apocalyptic number.

It is an amenable number.

99915929 is a deficient number, since it is larger than the sum of its proper divisors (1).

99915929 is an equidigital number, since it uses as much as digits as its factorization.

99915929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 590490, while the sum is 53.

The square root of 99915929 is about 9995.7955661368. The cubic root of 99915929 is about 464.0287725544.

The spelling of 99915929 in words is "ninety-nine million, nine hundred fifteen thousand, nine hundred twenty-nine".