3147125813 has 4 divisors (see below), whose sum is σ = 3389212428. Its totient is φ = 2905039200.

The previous prime is 3147125803. The next prime is 3147125831. The reversal of 3147125813 is 3185217413.

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 1978648324 + 1168477489 = 44482^2 + 34183^2 .

It is a cyclic number.

It is not a de Polignac number, because 3147125813 - 2¹⁶ = 3147060277 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 (3147125803) 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 3 ways as a sum of consecutive naturals, for example, 121043288 + ... + 121043313.

It is an arithmetic number, because the mean of its divisors is an integer number (847303107).

Almost surely, 2^3147125813 is an apocalyptic number.

It is an amenable number.

3147125813 is a deficient number, since it is larger than the sum of its proper divisors (242086615).

3147125813 is a wasteful number, since it uses less digits than its factorization.

3147125813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242086614.

The product of its digits is 20160, while the sum is 35.

The square root of 3147125813 is about 56099.2496652139. The cubic root of 3147125813 is about 1465.4512253014.

The spelling of 3147125813 in words is "three billion, one hundred forty-seven million, one hundred twenty-five thousand, eight hundred thirteen".