677942977 has 2 divisors, whose sum is σ = 677942978. Its totient is φ = 677942976.

The previous prime is 677942957. The next prime is 677943001. The reversal of 677942977 is 779249776.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 429691441 + 248251536 = 20729^2 + 15756^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-677942977 is a prime.

It is not a weakly prime, because it can be changed into another prime (677942927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338971488 + 338971489.

It is an arithmetic number, because the mean of its divisors is an integer number (338971489).

Almost surely, 2^677942977 is an apocalyptic number.

It is an amenable number.

677942977 is a deficient number, since it is larger than the sum of its proper divisors (1).

677942977 is an equidigital number, since it uses as much as digits as its factorization.

677942977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9335088, while the sum is 58.

The square root of 677942977 is about 26037.3381319981. The cubic root of 677942977 is about 878.4783349246.

The spelling of 677942977 in words is "six hundred seventy-seven million, nine hundred forty-two thousand, nine hundred seventy-seven".