99370631 has 2 divisors, whose sum is σ = 99370632. Its totient is φ = 99370630.

The previous prime is 99370571. The next prime is 99370651. The reversal of 99370631 is 13607399.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99370631 is a prime.

It is a super-2 number, since 2×99370631² = 19749044610676322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99370651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49685315 + 49685316.

It is an arithmetic number, because the mean of its divisors is an integer number (49685316).

Almost surely, 2^99370631 is an apocalyptic number.

99370631 is a deficient number, since it is larger than the sum of its proper divisors (1).

99370631 is an equidigital number, since it uses as much as digits as its factorization.

99370631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30618, while the sum is 38.

The square root of 99370631 is about 9968.4818804069. The cubic root of 99370631 is about 463.1830759718.

It can be divided in two parts, 99370 and 631, that added together give a palindrome (100001).

The spelling of 99370631 in words is "ninety-nine million, three hundred seventy thousand, six hundred thirty-one".