3161893491 has 12 divisors (see below), whose sum is σ = 4572753120. Its totient is φ = 2105356560.

The previous prime is 3161893489. The next prime is 3161893507. The reversal of 3161893491 is 1943981613.

It is not a de Polignac number, because 3161893491 - 2¹ = 3161893489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3161893591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 206571 + ... + 221348.

It is an arithmetic number, because the mean of its divisors is an integer number (381062760).

Almost surely, 2^3161893491 is an apocalyptic number.

3161893491 is a deficient number, since it is larger than the sum of its proper divisors (1410859629).

3161893491 is a wasteful number, since it uses less digits than its factorization.

3161893491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428746 (or 428743 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 3161893491 is about 56230.7166146760. The cubic root of 3161893491 is about 1467.7398267042.

The spelling of 3161893491 in words is "three billion, one hundred sixty-one million, eight hundred ninety-three thousand, four hundred ninety-one".