99308257 has 2 divisors, whose sum is σ = 99308258. Its totient is φ = 99308256.

The previous prime is 99308243. The next prime is 99308263. The reversal of 99308257 is 75280399.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87030241 + 12278016 = 9329^2 + 3504^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99308257 is a prime.

It is not a weakly prime, because it can be changed into another prime (99308057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49654128 + 49654129.

It is an arithmetic number, because the mean of its divisors is an integer number (49654129).

Almost surely, 2^99308257 is an apocalyptic number.

It is an amenable number.

99308257 is a deficient number, since it is larger than the sum of its proper divisors (1).

99308257 is an equidigital number, since it uses as much as digits as its factorization.

99308257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 99308257 is about 9965.3528286760. The cubic root of 99308257 is about 463.0861438173.

The spelling of 99308257 in words is "ninety-nine million, three hundred eight thousand, two hundred fifty-seven".