3121645117 has 2 divisors, whose sum is σ = 3121645118. Its totient is φ = 3121645116.

The previous prime is 3121645081. The next prime is 3121645183. The reversal of 3121645117 is 7115461213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2958163321 + 163481796 = 54389^2 + 12786^2 .

It is a cyclic number.

It is not a de Polignac number, because 3121645117 - 2¹¹ = 3121643069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3121645817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560822558 + 1560822559.

It is an arithmetic number, because the mean of its divisors is an integer number (1560822559).

Almost surely, 2^3121645117 is an apocalyptic number.

It is an amenable number.

3121645117 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121645117 is an equidigital number, since it uses as much as digits as its factorization.

3121645117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 31.

The square root of 3121645117 is about 55871.6843937965. The cubic root of 3121645117 is about 1461.4854957756.

The spelling of 3121645117 in words is "three billion, one hundred twenty-one million, six hundred forty-five thousand, one hundred seventeen".