655734857 has 2 divisors, whose sum is σ = 655734858. Its totient is φ = 655734856.

The previous prime is 655734851. The next prime is 655734887. The reversal of 655734857 is 758437556.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 654285241 + 1449616 = 25579^2 + 1204^2 .

It is a cyclic number.

It is not a de Polignac number, because 655734857 - 2⁸ = 655734601 is a prime.

It is not a weakly prime, because it can be changed into another prime (655734851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327867428 + 327867429.

It is an arithmetic number, because the mean of its divisors is an integer number (327867429).

Almost surely, 2^655734857 is an apocalyptic number.

It is an amenable number.

655734857 is a deficient number, since it is larger than the sum of its proper divisors (1).

655734857 is an equidigital number, since it uses as much as digits as its factorization.

655734857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3528000, while the sum is 50.

The square root of 655734857 is about 25607.3203791416. The cubic root of 655734857 is about 868.7792174705.

It can be divided in two parts, 6557 and 34857, that added together give a palindrome (41414).

The spelling of 655734857 in words is "six hundred fifty-five million, seven hundred thirty-four thousand, eight hundred fifty-seven".