99969257 has 2 divisors, whose sum is σ = 99969258. Its totient is φ = 99969256.

The previous prime is 99969253. The next prime is 99969319. The reversal of 99969257 is 75296999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67831696 + 32137561 = 8236^2 + 5669^2 .

It is a cyclic number.

It is not a de Polignac number, because 99969257 - 2² = 99969253 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99969251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49984628 + 49984629.

It is an arithmetic number, because the mean of its divisors is an integer number (49984629).

Almost surely, 2^99969257 is an apocalyptic number.

It is an amenable number.

99969257 is a deficient number, since it is larger than the sum of its proper divisors (1).

99969257 is an equidigital number, since it uses as much as digits as its factorization.

99969257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2755620, while the sum is 56.

The square root of 99969257 is about 9998.4627318403. The cubic root of 99969257 is about 464.1113130309. Note that the first 3 decimals are identical.

The spelling of 99969257 in words is "ninety-nine million, nine hundred sixty-nine thousand, two hundred fifty-seven".