3117890881 has 4 divisors (see below), whose sum is σ = 3563303872. Its totient is φ = 2672477892.

The previous prime is 3117890863. The next prime is 3117890887. The reversal of 3117890881 is 1880987113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1880987113 = 569 ⋅3305777.

It is not a de Polignac number, because 3117890881 - 2¹⁵ = 3117858113 is a prime.

It is a super-2 number, since 2×3117890881² = 19442487091645912322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3117890887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222706485 + ... + 222706498.

It is an arithmetic number, because the mean of its divisors is an integer number (890825968).

Almost surely, 2^3117890881 is an apocalyptic number.

It is an amenable number.

3117890881 is a deficient number, since it is larger than the sum of its proper divisors (445412991).

3117890881 is an equidigital number, since it uses as much as digits as its factorization.

3117890881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445412990.

The product of its (nonzero) digits is 96768, while the sum is 46.

The square root of 3117890881 is about 55838.0773397509. The cubic root of 3117890881 is about 1460.8993772097.

The spelling of 3117890881 in words is "three billion, one hundred seventeen million, eight hundred ninety thousand, eight hundred eighty-one".