677508691 has 2 divisors, whose sum is σ = 677508692. Its totient is φ = 677508690.

The previous prime is 677508683. The next prime is 677508709. The reversal of 677508691 is 196805776.

677508691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 677508691 - 2³ = 677508683 is a prime.

It is not a weakly prime, because it can be changed into another prime (677506691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338754345 + 338754346.

It is an arithmetic number, because the mean of its divisors is an integer number (338754346).

Almost surely, 2^677508691 is an apocalyptic number.

677508691 is a deficient number, since it is larger than the sum of its proper divisors (1).

677508691 is an equidigital number, since it uses as much as digits as its factorization.

677508691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 635040, while the sum is 49.

The square root of 677508691 is about 26028.9971185983. The cubic root of 677508691 is about 878.2907122933.

The spelling of 677508691 in words is "six hundred seventy-seven million, five hundred eight thousand, six hundred ninety-one".