1299839513 has 6 divisors (see below), whose sum is σ = 1512058266. Its totient is φ = 1114148112.

The previous prime is 1299839491. The next prime is 1299839551. The reversal of 1299839513 is 3159389921.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 761042569 + 538796944 = 27587^2 + 23212^2 .

It is not a de Polignac number, because 1299839513 - 2⁶ = 1299839449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1299839413) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13263620 + ... + 13263717.

It is an arithmetic number, because the mean of its divisors is an integer number (252009711).

Almost surely, 2^1299839513 is an apocalyptic number.

It is an amenable number.

1299839513 is a deficient number, since it is larger than the sum of its proper divisors (212218753).

1299839513 is an equidigital number, since it uses as much as digits as its factorization.

1299839513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26527351 (or 26527344 counting only the distinct ones).

The product of its digits is 524880, while the sum is 50.

The square root of 1299839513 is about 36053.2871316888. The cubic root of 1299839513 is about 1091.3479698360.

The spelling of 1299839513 in words is "one billion, two hundred ninety-nine million, eight hundred thirty-nine thousand, five hundred thirteen".