676949813 has 4 divisors (see below), whose sum is σ = 700292940. Its totient is φ = 653606688.

The previous prime is 676949807. The next prime is 676949839. The reversal of 676949813 is 318949676.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 415222129 + 261727684 = 20377^2 + 16178^2 .

It is a cyclic number.

It is not a de Polignac number, because 676949813 - 2⁴ = 676949797 is a prime.

It is a super-2 number, since 2×676949813² = 916522098641469938, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (676949873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11671520 + ... + 11671577.

It is an arithmetic number, because the mean of its divisors is an integer number (175073235).

Almost surely, 2^676949813 is an apocalyptic number.

It is an amenable number.

676949813 is a deficient number, since it is larger than the sum of its proper divisors (23343127).

676949813 is a wasteful number, since it uses less digits than its factorization.

676949813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23343126.

The product of its digits is 1959552, while the sum is 53.

The square root of 676949813 is about 26018.2592230918. The cubic root of 676949813 is about 878.0491447214.

The spelling of 676949813 in words is "six hundred seventy-six million, nine hundred forty-nine thousand, eight hundred thirteen".