677456831 has 2 divisors, whose sum is σ = 677456832. Its totient is φ = 677456830.

The previous prime is 677456779. The next prime is 677456867. The reversal of 677456831 is 138654776.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-677456831 is a prime.

It is a super-2 number, since 2×677456831² = 917895515737125122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (677456431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338728415 + 338728416.

It is an arithmetic number, because the mean of its divisors is an integer number (338728416).

Almost surely, 2^677456831 is an apocalyptic number.

677456831 is a deficient number, since it is larger than the sum of its proper divisors (1).

677456831 is an equidigital number, since it uses as much as digits as its factorization.

677456831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 846720, while the sum is 47.

The square root of 677456831 is about 26028.0009028738. Note that the first 3 decimals coincide. The cubic root of 677456831 is about 878.2683020919.

Subtracting from 677456831 its sum of digits (47), we obtain a square (677456784 = 26028²).

The spelling of 677456831 in words is "six hundred seventy-seven million, four hundred fifty-six thousand, eight hundred thirty-one".