99086531 has 2 divisors, whose sum is σ = 99086532. Its totient is φ = 99086530.

The previous prime is 99086503. The next prime is 99086549. The reversal of 99086531 is 13568099.

It is a strong prime.

It is an emirp because it is prime and its reverse (13568099) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99086531 - 2⁶ = 99086467 is a prime.

It is a super-2 number, since 2×99086531² = 19636281251227922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (99086131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49543265 + 49543266.

It is an arithmetic number, because the mean of its divisors is an integer number (49543266).

Almost surely, 2^99086531 is an apocalyptic number.

99086531 is a deficient number, since it is larger than the sum of its proper divisors (1).

99086531 is an equidigital number, since it uses as much as digits as its factorization.

99086531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 99086531 is about 9954.2217676722. The cubic root of 99086531 is about 462.7412421509.

The spelling of 99086531 in words is "ninety-nine million, eighty-six thousand, five hundred thirty-one".