99957967 has 2 divisors, whose sum is σ = 99957968. Its totient is φ = 99957966.

The previous prime is 99957953. The next prime is 99957971. The reversal of 99957967 is 76975999.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99957967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99955967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49978983 + 49978984.

It is an arithmetic number, because the mean of its divisors is an integer number (49978984).

Almost surely, 2^99957967 is an apocalyptic number.

99957967 is a deficient number, since it is larger than the sum of its proper divisors (1).

99957967 is an equidigital number, since it uses as much as digits as its factorization.

99957967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9644670, while the sum is 61.

The square root of 99957967 is about 9997.8981291069. The cubic root of 99957967 is about 464.0938409462.

The spelling of 99957967 in words is "ninety-nine million, nine hundred fifty-seven thousand, nine hundred sixty-seven".