1325913813 has 16 divisors (see below), whose sum is σ = 2244933760. Its totient is φ = 757664928.

The previous prime is 1325913791. The next prime is 1325913829. The reversal of 1325913813 is 3183195231.

1325913813 is a `hidden beast` number, since 1 + 32 + 591 + 38 + 1 + 3 = 666.

It is not a de Polignac number, because 1325913813 - 2¹⁰ = 1325912789 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1325913713) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3507520 + ... + 3507897.

It is an arithmetic number, because the mean of its divisors is an integer number (140308360).

Almost surely, 2^1325913813 is an apocalyptic number.

It is an amenable number.

1325913813 is a deficient number, since it is larger than the sum of its proper divisors (919019947).

1325913813 is an equidigital number, since it uses as much as digits as its factorization.

1325913813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7015433 (or 7015427 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 1325913813 is about 36413.0994698337. The cubic root of 1325913813 is about 1098.5970580024.

It can be divided in two parts, 13259 and 13813, that added together give a palindrome (27072).

The spelling of 1325913813 in words is "one billion, three hundred twenty-five million, nine hundred thirteen thousand, eight hundred thirteen".