773131313 has 4 divisors (see below), whose sum is σ = 773260020. Its totient is φ = 773002608.

The previous prime is 773131279. The next prime is 773131363. The reversal of 773131313 is 313131377.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 313131377 = 13 ⋅24087029.

It can be written as a sum of positive squares in 2 ways, for example, as 568727104 + 204404209 = 23848^2 + 14297^2 .

It is a cyclic number.

It is not a de Polignac number, because 773131313 - 2⁸ = 773131057 is a prime.

It is a super-2 number, since 2×773131313² = 1195464054282207938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (773131363) 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, 54878 + ... + 67511.

It is an arithmetic number, because the mean of its divisors is an integer number (193315005).

Almost surely, 2^773131313 is an apocalyptic number.

It is an amenable number.

773131313 is a deficient number, since it is larger than the sum of its proper divisors (128707).

773131313 is a wasteful number, since it uses less digits than its factorization.

773131313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128706.

The product of its digits is 3969, while the sum is 29.

The square root of 773131313 is about 27805.2389488024. The cubic root of 773131313 is about 917.8064126168.

The spelling of 773131313 in words is "seven hundred seventy-three million, one hundred thirty-one thousand, three hundred thirteen".