99563831 has 2 divisors, whose sum is σ = 99563832. Its totient is φ = 99563830.

The previous prime is 99563777. The next prime is 99563833. The reversal of 99563831 is 13836599.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99563831 - 2¹⁴ = 99547447 is a prime.

It is a super-2 number, since 2×99563831² = 19825912886793122, which contains 22 as substring.

Together with 99563833, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99563833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49781915 + 49781916.

It is an arithmetic number, because the mean of its divisors is an integer number (49781916).

Almost surely, 2^99563831 is an apocalyptic number.

99563831 is a deficient number, since it is larger than the sum of its proper divisors (1).

99563831 is an equidigital number, since it uses as much as digits as its factorization.

99563831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174960, while the sum is 44.

The square root of 99563831 is about 9978.1677175722. The cubic root of 99563831 is about 463.4830607773.

The spelling of 99563831 in words is "ninety-nine million, five hundred sixty-three thousand, eight hundred thirty-one".