8857256747 has 2 divisors, whose sum is σ = 8857256748. Its totient is φ = 8857256746.

The previous prime is 8857256743. The next prime is 8857256797. The reversal of 8857256747 is 7476527588.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8857256747 - 2² = 8857256743 is a prime.

It is not a weakly prime, because it can be changed into another prime (8857256743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4428628373 + 4428628374.

It is an arithmetic number, because the mean of its divisors is an integer number (4428628374).

Almost surely, 2^8857256747 is an apocalyptic number.

8857256747 is a deficient number, since it is larger than the sum of its proper divisors (1).

8857256747 is an equidigital number, since it uses as much as digits as its factorization.

8857256747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26342400, while the sum is 59.

The square root of 8857256747 is about 94112.9998831192. Note that the first 3 decimals coincide. The cubic root of 8857256747 is about 2069.0282062825.

The spelling of 8857256747 in words is "eight billion, eight hundred fifty-seven million, two hundred fifty-six thousand, seven hundred forty-seven".