3121974091 has 8 divisors (see below), whose sum is σ = 3234765600. Its totient is φ = 3009525120.

The previous prime is 3121974047. The next prime is 3121974103. The reversal of 3121974091 is 1904791213.

3121974091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3121974091 - 2⁷ = 3121973963 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3121974091.

It is not an unprimeable number, because it can be changed into a prime (3121974001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67006 + ... + 103603.

It is an arithmetic number, because the mean of its divisors is an integer number (404345700).

Almost surely, 2^3121974091 is an apocalyptic number.

3121974091 is a deficient number, since it is larger than the sum of its proper divisors (112791509).

3121974091 is a wasteful number, since it uses less digits than its factorization.

3121974091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171269.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 3121974091 is about 55874.6283298601. The cubic root of 3121974091 is about 1461.5368334329.

The spelling of 3121974091 in words is "three billion, one hundred twenty-one million, nine hundred seventy-four thousand, ninety-one".