99939967 has 2 divisors, whose sum is σ = 99939968. Its totient is φ = 99939966.

The previous prime is 99939953. The next prime is 99940007. The reversal of 99939967 is 76993999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99939967 - 2²³ = 91551359 is a prime.

It is a super-2 number, since 2×99939967² = 19975994007922178, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99939937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49969983 + 49969984.

It is an arithmetic number, because the mean of its divisors is an integer number (49969984).

Almost surely, 2^99939967 is an apocalyptic number.

99939967 is a deficient number, since it is larger than the sum of its proper divisors (1).

99939967 is an equidigital number, since it uses as much as digits as its factorization.

99939967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7440174, while the sum is 61.

The square root of 99939967 is about 9996.9978993696. The cubic root of 99939967 is about 464.0659819341.

The spelling of 99939967 in words is "ninety-nine million, nine hundred thirty-nine thousand, nine hundred sixty-seven".