677674981 has 2 divisors, whose sum is σ = 677674982. Its totient is φ = 677674980.

The previous prime is 677674951. The next prime is 677675023. The reversal of 677674981 is 189476776.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 409698081 + 267976900 = 20241^2 + 16370^2 .

It is a cyclic number.

It is not a de Polignac number, because 677674981 - 2⁹ = 677674469 is a prime.

It is a super-2 number, since 2×677674981² = 918486759746700722, 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 (677674951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338837490 + 338837491.

It is an arithmetic number, because the mean of its divisors is an integer number (338837491).

Almost surely, 2^677674981 is an apocalyptic number.

It is an amenable number.

677674981 is a deficient number, since it is larger than the sum of its proper divisors (1).

677674981 is an equidigital number, since it uses as much as digits as its factorization.

677674981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3556224, while the sum is 55.

The square root of 677674981 is about 26032.1912446878. The cubic root of 677674981 is about 878.3625632855.

The spelling of 677674981 in words is "six hundred seventy-seven million, six hundred seventy-four thousand, nine hundred eighty-one".