1264335613 has 2 divisors, whose sum is σ = 1264335614. Its totient is φ = 1264335612.

The previous prime is 1264335587. The next prime is 1264335629. The reversal of 1264335613 is 3165334621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 814132089 + 450203524 = 28533^2 + 21218^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1264335613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1264335113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632167806 + 632167807.

It is an arithmetic number, because the mean of its divisors is an integer number (632167807).

Almost surely, 2^1264335613 is an apocalyptic number.

It is an amenable number.

1264335613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264335613 is an equidigital number, since it uses as much as digits as its factorization.

1264335613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 34.

The square root of 1264335613 is about 35557.4972825704. The cubic root of 1264335613 is about 1081.3197209967.

The spelling of 1264335613 in words is "one billion, two hundred sixty-four million, three hundred thirty-five thousand, six hundred thirteen".