677855987 has 2 divisors, whose sum is σ = 677855988. Its totient is φ = 677855986.

The previous prime is 677855953. The next prime is 677856001. The reversal of 677855987 is 789558776.

677855987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 677855987 - 2²⁴ = 661078771 is a prime.

It is a super-2 number, since 2×677855987² = 918977478223488338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (677855687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338927993 + 338927994.

It is an arithmetic number, because the mean of its divisors is an integer number (338927994).

Almost surely, 2^677855987 is an apocalyptic number.

677855987 is a deficient number, since it is larger than the sum of its proper divisors (1).

677855987 is an equidigital number, since it uses as much as digits as its factorization.

677855987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29635200, while the sum is 62.

The square root of 677855987 is about 26035.6675927467. The cubic root of 677855987 is about 878.4407594442.

The spelling of 677855987 in words is "six hundred seventy-seven million, eight hundred fifty-five thousand, nine hundred eighty-seven".