677989877 has 2 divisors, whose sum is σ = 677989878. Its totient is φ = 677989876.

The previous prime is 677989859. The next prime is 677989957. The reversal of 677989877 is 778989776.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 602751601 + 75238276 = 24551^2 + 8674^2 .

It is a cyclic number.

It is not a de Polignac number, because 677989877 - 2²⁶ = 610881013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (677989177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338994938 + 338994939.

It is an arithmetic number, because the mean of its divisors is an integer number (338994939).

Almost surely, 2^677989877 is an apocalyptic number.

It is an amenable number.

677989877 is a deficient number, since it is larger than the sum of its proper divisors (1).

677989877 is an equidigital number, since it uses as much as digits as its factorization.

677989877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 74680704, while the sum is 68.

The square root of 677989877 is about 26038.2387461211. The cubic root of 677989877 is about 878.4985921268.

The spelling of 677989877 in words is "six hundred seventy-seven million, nine hundred eighty-nine thousand, eight hundred seventy-seven".