1311400697 has 2 divisors, whose sum is σ = 1311400698. Its totient is φ = 1311400696.

The previous prime is 1311400693. The next prime is 1311400709. The reversal of 1311400697 is 7960041131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1295208121 + 16192576 = 35989^2 + 4024^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311400697 - 2² = 1311400693 is a prime.

It is not a weakly prime, because it can be changed into another prime (1311400693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655700348 + 655700349.

It is an arithmetic number, because the mean of its divisors is an integer number (655700349).

Almost surely, 2^1311400697 is an apocalyptic number.

It is an amenable number.

1311400697 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311400697 is an equidigital number, since it uses as much as digits as its factorization.

1311400697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 1311400697 is about 36213.2668645070. The cubic root of 1311400697 is about 1094.5740222238.

The spelling of 1311400697 in words is "one billion, three hundred eleven million, four hundred thousand, six hundred ninety-seven".