1313864381 has 2 divisors, whose sum is σ = 1313864382. Its totient is φ = 1313864380.

The previous prime is 1313864347. The next prime is 1313864389. The reversal of 1313864381 is 1834683131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 969761881 + 344102500 = 31141^2 + 18550^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1313864381 is a prime.

It is a super-2 number, since 2×1313864381² = 3452479223321026322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1313864389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656932190 + 656932191.

It is an arithmetic number, because the mean of its divisors is an integer number (656932191).

Almost surely, 2^1313864381 is an apocalyptic number.

It is an amenable number.

1313864381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313864381 is an equidigital number, since it uses as much as digits as its factorization.

1313864381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 38.

The square root of 1313864381 is about 36247.2672211299. The cubic root of 1313864381 is about 1095.2590397903.

The spelling of 1313864381 in words is "one billion, three hundred thirteen million, eight hundred sixty-four thousand, three hundred eighty-one".