99137531 has 2 divisors, whose sum is σ = 99137532. Its totient is φ = 99137530.

The previous prime is 99137527. The next prime is 99137551. The reversal of 99137531 is 13573199.

It is a weak prime.

It is an emirp because it is prime and its reverse (13573199) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99137531 - 2² = 99137527 is a prime.

It is a super-2 number, since 2×99137531² = 19656500105551922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (99137551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49568765 + 49568766.

It is an arithmetic number, because the mean of its divisors is an integer number (49568766).

Almost surely, 2^99137531 is an apocalyptic number.

99137531 is a deficient number, since it is larger than the sum of its proper divisors (1).

99137531 is an equidigital number, since it uses as much as digits as its factorization.

99137531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25515, while the sum is 38.

The square root of 99137531 is about 9956.7831652598. The cubic root of 99137531 is about 462.8206197593.

The spelling of 99137531 in words is "ninety-nine million, one hundred thirty-seven thousand, five hundred thirty-one".