1313028657 has 32 divisors (see below), whose sum is σ = 2031753600. Its totient is φ = 837221184.

The previous prime is 1313028517. The next prime is 1313028667. The reversal of 1313028657 is 7568203131.

It is not a de Polignac number, because 1313028657 - 2⁸ = 1313028401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1313028667) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47803 + ... + 70079.

It is an arithmetic number, because the mean of its divisors is an integer number (63492300).

Almost surely, 2^1313028657 is an apocalyptic number.

It is an amenable number.

1313028657 is a deficient number, since it is larger than the sum of its proper divisors (718724943).

1313028657 is a wasteful number, since it uses less digits than its factorization.

1313028657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22382 (or 22376 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 1313028657 is about 36235.7372906914. The cubic root of 1313028657 is about 1095.0267660937.

The spelling of 1313028657 in words is "one billion, three hundred thirteen million, twenty-eight thousand, six hundred fifty-seven".