677958813 has 24 divisors (see below), whose sum is σ = 1126315008. Its totient is φ = 384931872.

The previous prime is 677958773. The next prime is 677958823. The reversal of 677958813 is 318859776.

It is not a de Polignac number, because 677958813 - 2²¹ = 675861661 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 677958813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (677958823) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24381 + ... + 44162.

It is an arithmetic number, because the mean of its divisors is an integer number (46929792).

Almost surely, 2^677958813 is an apocalyptic number.

677958813 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

677958813 is a deficient number, since it is larger than the sum of its proper divisors (448356195).

677958813 is a wasteful number, since it uses less digits than its factorization.

677958813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68713 (or 68710 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 54.

The square root of 677958813 is about 26037.6422319687. The cubic root of 677958813 is about 878.4851749662.

The spelling of 677958813 in words is "six hundred seventy-seven million, nine hundred fifty-eight thousand, eight hundred thirteen".