5091000857 has 2 divisors, whose sum is σ = 5091000858. Its totient is φ = 5091000856.

The previous prime is 5091000853. The next prime is 5091000917. The reversal of 5091000857 is 7580001905.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4851958336 + 239042521 = 69656^2 + 15461^2 .

It is a cyclic number.

It is not a de Polignac number, because 5091000857 - 2² = 5091000853 is a prime.

It is not a weakly prime, because it can be changed into another prime (5091000853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2545500428 + 2545500429.

It is an arithmetic number, because the mean of its divisors is an integer number (2545500429).

Almost surely, 2^5091000857 is an apocalyptic number.

It is an amenable number.

5091000857 is a deficient number, since it is larger than the sum of its proper divisors (1).

5091000857 is an equidigital number, since it uses as much as digits as its factorization.

5091000857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12600, while the sum is 35.

The square root of 5091000857 is about 71351.2498629141. The cubic root of 5091000857 is about 1720.2875912880.

The spelling of 5091000857 in words is "five billion, ninety-one million, eight hundred fifty-seven", and thus it is an aban number.