1313399727 has 36 divisors (see below), whose sum is σ = 1955717400. Its totient is φ = 849172896.

The previous prime is 1313399629. The next prime is 1313399743. The reversal of 1313399727 is 7279933131.

It is a happy number.

It is not a de Polignac number, because 1313399727 - 2¹⁸ = 1313137583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313399327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3763149 + ... + 3763497.

Almost surely, 2^1313399727 is an apocalyptic number.

1313399727 is a deficient number, since it is larger than the sum of its proper divisors (642317673).

1313399727 is an equidigital number, since it uses as much as digits as its factorization.

1313399727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580 (or 498 counting only the distinct ones).

The product of its digits is 214326, while the sum is 45.

The square root of 1313399727 is about 36240.8571504593. The cubic root of 1313399727 is about 1095.1299101514.

The spelling of 1313399727 in words is "one billion, three hundred thirteen million, three hundred ninety-nine thousand, seven hundred twenty-seven".