677731357 has 2 divisors, whose sum is σ = 677731358. Its totient is φ = 677731356.

The previous prime is 677731319. The next prime is 677731361. The reversal of 677731357 is 753137776.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 565773796 + 111957561 = 23786^2 + 10581^2 .

It is a cyclic number.

It is not a de Polignac number, because 677731357 - 2²³ = 669342749 is a prime.

It is a super-2 number, since 2×677731357² = 918639584522122898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (677731157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338865678 + 338865679.

It is an arithmetic number, because the mean of its divisors is an integer number (338865679).

Almost surely, 2^677731357 is an apocalyptic number.

It is an amenable number.

677731357 is a deficient number, since it is larger than the sum of its proper divisors (1).

677731357 is an equidigital number, since it uses as much as digits as its factorization.

677731357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648270, while the sum is 46.

The square root of 677731357 is about 26033.2740353571. The cubic root of 677731357 is about 878.3869196983.

The spelling of 677731357 in words is "six hundred seventy-seven million, seven hundred thirty-one thousand, three hundred fifty-seven".