3121491374 has 4 divisors (see below), whose sum is σ = 4682237064. Its totient is φ = 1560745686.

The previous prime is 3121491353. The next prime is 3121491383. The reversal of 3121491374 is 4731941213.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 780372842 + ... + 780372845.

It is an arithmetic number, because the mean of its divisors is an integer number (1170559266).

Almost surely, 2^3121491374 is an apocalyptic number.

3121491374 is a deficient number, since it is larger than the sum of its proper divisors (1560745690).

3121491374 is a wasteful number, since it uses less digits than its factorization.

3121491374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1560745689.

The product of its digits is 18144, while the sum is 35.

The square root of 3121491374 is about 55870.3085189262. The cubic root of 3121491374 is about 1461.4615023528.

The spelling of 3121491374 in words is "three billion, one hundred twenty-one million, four hundred ninety-one thousand, three hundred seventy-four".