1312184513 has 4 divisors (see below), whose sum is σ = 1312685508. Its totient is φ = 1311683520.

The previous prime is 1312184507. The next prime is 1312184537. The reversal of 1312184513 is 3154812131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 137545984 + 1174638529 = 11728^2 + 34273^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312184513 - 2⁶ = 1312184449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312184543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 246548 + ... + 251813.

It is an arithmetic number, because the mean of its divisors is an integer number (328171377).

Almost surely, 2^1312184513 is an apocalyptic number.

It is an amenable number.

1312184513 is a deficient number, since it is larger than the sum of its proper divisors (500995).

1312184513 is an equidigital number, since it uses as much as digits as its factorization.

1312184513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500994.

The product of its digits is 2880, while the sum is 29.

The square root of 1312184513 is about 36224.0874695278. The cubic root of 1312184513 is about 1094.7920521418.

Adding to 1312184513 its reverse (3154812131), we get a palindrome (4466996644).

The spelling of 1312184513 in words is "one billion, three hundred twelve million, one hundred eighty-four thousand, five hundred thirteen".