99531967 has 2 divisors, whose sum is σ = 99531968. Its totient is φ = 99531966.

The previous prime is 99531941. The next prime is 99531983. The reversal of 99531967 is 76913599.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99531967 is a prime.

It is a super-2 number, since 2×99531967² = 19813224909778178, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 99531967.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99531167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49765983 + 49765984.

It is an arithmetic number, because the mean of its divisors is an integer number (49765984).

Almost surely, 2^99531967 is an apocalyptic number.

99531967 is a deficient number, since it is larger than the sum of its proper divisors (1).

99531967 is an equidigital number, since it uses as much as digits as its factorization.

99531967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 459270, while the sum is 49.

The square root of 99531967 is about 9976.5709038727. The cubic root of 99531967 is about 463.4336117627.

The spelling of 99531967 in words is "ninety-nine million, five hundred thirty-one thousand, nine hundred sixty-seven".