99919331 has 2 divisors, whose sum is σ = 99919332. Its totient is φ = 99919330.

The previous prime is 99919307. The next prime is 99919343. The reversal of 99919331 is 13391999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99919331 - 2¹⁴ = 99902947 is a prime.

It is a super-2 number, since 2×99919331² = 19967745414975122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99919361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49959665 + 49959666.

It is an arithmetic number, because the mean of its divisors is an integer number (49959666).

Almost surely, 2^99919331 is an apocalyptic number.

99919331 is a deficient number, since it is larger than the sum of its proper divisors (1).

99919331 is an equidigital number, since it uses as much as digits as its factorization.

99919331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 59049, while the sum is 44.

The square root of 99919331 is about 9995.9657362358. The cubic root of 99919331 is about 464.0340390085.

The spelling of 99919331 in words is "ninety-nine million, nine hundred nineteen thousand, three hundred thirty-one".