99512431 has 2 divisors, whose sum is σ = 99512432. Its totient is φ = 99512430.

The previous prime is 99512423. The next prime is 99512437. The reversal of 99512431 is 13421599.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99512431 - 2³ = 99512423 is a prime.

It is a super-2 number, since 2×99512431² = 19805447847059522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99512437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49756215 + 49756216.

It is an arithmetic number, because the mean of its divisors is an integer number (49756216).

Almost surely, 2^99512431 is an apocalyptic number.

99512431 is a deficient number, since it is larger than the sum of its proper divisors (1).

99512431 is an equidigital number, since it uses as much as digits as its factorization.

99512431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 34.

The square root of 99512431 is about 9975.5917618956. The cubic root of 99512431 is about 463.4032890710.

The spelling of 99512431 in words is "ninety-nine million, five hundred twelve thousand, four hundred thirty-one".