2975644813 has 4 divisors (see below), whose sum is σ = 2976197148. Its totient is φ = 2975092480.

The previous prime is 2975644783. The next prime is 2975644817. The reversal of 2975644813 is 3184465792.

It is a happy number.

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 2508306889 + 467337924 = 50083^2 + 21618^2 .

It is a cyclic number.

It is not a de Polignac number, because 2975644813 - 2⁵ = 2975644781 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2975644817) 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, 268006 + ... + 278887.

It is an arithmetic number, because the mean of its divisors is an integer number (744049287).

Almost surely, 2^2975644813 is an apocalyptic number.

It is an amenable number.

2975644813 is a deficient number, since it is larger than the sum of its proper divisors (552335).

2975644813 is an equidigital number, since it uses as much as digits as its factorization.

2975644813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552334.

The product of its digits is 1451520, while the sum is 49.

The square root of 2975644813 is about 54549.4712440002. The cubic root of 2975644813 is about 1438.3360430484.

The spelling of 2975644813 in words is "two billion, nine hundred seventy-five million, six hundred forty-four thousand, eight hundred thirteen".