1234312813 has 4 divisors (see below), whose sum is σ = 1257601788. Its totient is φ = 1211023840.

The previous prime is 1234312811. The next prime is 1234312817. The reversal of 1234312813 is 3182134321.

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 1012957929 + 221354884 = 31827^2 + 14878^2 .

It is a cyclic number.

It is not a de Polignac number, because 1234312813 - 2¹ = 1234312811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1234312811) 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, 11644408 + ... + 11644513.

It is an arithmetic number, because the mean of its divisors is an integer number (314400447).

Almost surely, 2^1234312813 is an apocalyptic number.

It is an amenable number.

1234312813 is a deficient number, since it is larger than the sum of its proper divisors (23288975).

1234312813 is an equidigital number, since it uses as much as digits as its factorization.

1234312813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23288974.

The product of its digits is 3456, while the sum is 28.

The square root of 1234312813 is about 35132.7882895736. The cubic root of 1234312813 is about 1072.6920923110.

The spelling of 1234312813 in words is "one billion, two hundred thirty-four million, three hundred twelve thousand, eight hundred thirteen".