1315901893 has 2 divisors, whose sum is σ = 1315901894. Its totient is φ = 1315901892.

The previous prime is 1315901843. The next prime is 1315901897. The reversal of 1315901893 is 3981095131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1298737444 + 17164449 = 36038^2 + 4143^2 .

It is a cyclic number.

It is not a de Polignac number, because 1315901893 - 2²¹ = 1313804741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1315901897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 657950946 + 657950947.

It is an arithmetic number, because the mean of its divisors is an integer number (657950947).

Almost surely, 2^1315901893 is an apocalyptic number.

It is an amenable number.

1315901893 is a deficient number, since it is larger than the sum of its proper divisors (1).

1315901893 is an equidigital number, since it uses as much as digits as its factorization.

1315901893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 40.

The square root of 1315901893 is about 36275.3620657327. The cubic root of 1315901893 is about 1095.8249152561.

The spelling of 1315901893 in words is "one billion, three hundred fifteen million, nine hundred one thousand, eight hundred ninety-three".