1313430397 has 2 divisors, whose sum is σ = 1313430398. Its totient is φ = 1313430396.

The previous prime is 1313430389. The next prime is 1313430431. The reversal of 1313430397 is 7930343131.

It is an a-pointer prime, because the next prime (1313430431) can be obtained adding 1313430397 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 744798681 + 568631716 = 27291^2 + 23846^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313430397 - 2³ = 1313430389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1313430337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656715198 + 656715199.

It is an arithmetic number, because the mean of its divisors is an integer number (656715199).

Almost surely, 2^1313430397 is an apocalyptic number.

It is an amenable number.

1313430397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313430397 is an equidigital number, since it uses as much as digits as its factorization.

1313430397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 34.

The square root of 1313430397 is about 36241.2802891951. The cubic root of 1313430397 is about 1095.1384344345.

The spelling of 1313430397 in words is "one billion, three hundred thirteen million, four hundred thirty thousand, three hundred ninety-seven".