1315657873 has 2 divisors, whose sum is σ = 1315657874. Its totient is φ = 1315657872.

The previous prime is 1315657843. The next prime is 1315657879. The reversal of 1315657873 is 3787565131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 719956224 + 595701649 = 26832^2 + 24407^2 .

It is a cyclic number.

It is not a de Polignac number, because 1315657873 - 2⁹ = 1315657361 is a prime.

It is not a weakly prime, because it can be changed into another prime (1315657879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 657828936 + 657828937.

It is an arithmetic number, because the mean of its divisors is an integer number (657828937).

Almost surely, 2^1315657873 is an apocalyptic number.

It is an amenable number.

1315657873 is a deficient number, since it is larger than the sum of its proper divisors (1).

1315657873 is an equidigital number, since it uses as much as digits as its factorization.

1315657873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 529200, while the sum is 46.

The square root of 1315657873 is about 36271.9984698941. The cubic root of 1315657873 is about 1095.7571747130.

The spelling of 1315657873 in words is "one billion, three hundred fifteen million, six hundred fifty-seven thousand, eight hundred seventy-three".