99935531 has 2 divisors, whose sum is σ = 99935532. Its totient is φ = 99935530.

The previous prime is 99935513. The next prime is 99935543. The reversal of 99935531 is 13553999.

Together with previous prime (99935513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99935531 - 2¹⁴ = 99919147 is a prime.

It is a super-2 number, since 2×99935531² = 19974220712503922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99935501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49967765 + 49967766.

It is an arithmetic number, because the mean of its divisors is an integer number (49967766).

Almost surely, 2^99935531 is an apocalyptic number.

99935531 is a deficient number, since it is larger than the sum of its proper divisors (1).

99935531 is an equidigital number, since it uses as much as digits as its factorization.

99935531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 164025, while the sum is 44.

The square root of 99935531 is about 9996.7760303010. The cubic root of 99935531 is about 464.0591157216.

The spelling of 99935531 in words is "ninety-nine million, nine hundred thirty-five thousand, five hundred thirty-one".