99886531 has 2 divisors, whose sum is σ = 99886532. Its totient is φ = 99886530.

The previous prime is 99886529. The next prime is 99886559. The reversal of 99886531 is 13568899.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99886531 - 2¹ = 99886529 is a prime.

It is a super-2 number, since 2×99886531² = 19954638150427922, which contains 22 as substring.

Together with 99886529, it forms a pair of twin primes.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another prime (99886561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49943265 + 49943266.

It is an arithmetic number, because the mean of its divisors is an integer number (49943266).

Almost surely, 2^99886531 is an apocalyptic number.

99886531 is a deficient number, since it is larger than the sum of its proper divisors (1).

99886531 is an equidigital number, since it uses as much as digits as its factorization.

99886531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 49.

The square root of 99886531 is about 9994.3249396845. The cubic root of 99886531 is about 463.9832581033.

The spelling of 99886531 in words is "ninety-nine million, eight hundred eighty-six thousand, five hundred thirty-one".