8999906257 has 2 divisors, whose sum is σ = 8999906258. Its totient is φ = 8999906256.

The previous prime is 8999906207. The next prime is 8999906273. The reversal of 8999906257 is 7526099998.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6964903936 + 2035002321 = 83456^2 + 45111^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8999906257 is a prime.

It is not a weakly prime, because it can be changed into another prime (8999906207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4499953128 + 4499953129.

It is an arithmetic number, because the mean of its divisors is an integer number (4499953129).

Almost surely, 2^8999906257 is an apocalyptic number.

It is an amenable number.

8999906257 is a deficient number, since it is larger than the sum of its proper divisors (1).

8999906257 is an equidigital number, since it uses as much as digits as its factorization.

8999906257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22044960, while the sum is 64.

The square root of 8999906257 is about 94867.8357347737. The cubic root of 8999906257 is about 2080.0766010528.

The spelling of 8999906257 in words is "eight billion, nine hundred ninety-nine million, nine hundred six thousand, two hundred fifty-seven".