3118917881 has 2 divisors, whose sum is σ = 3118917882. Its totient is φ = 3118917880.

The previous prime is 3118917827. The next prime is 3118917889. The reversal of 3118917881 is 1887198113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1698758656 + 1420159225 = 41216^2 + 37685^2 .

It is a cyclic number.

It is not a de Polignac number, because 3118917881 - 2²⁶ = 3051809017 is a prime.

It is a super-2 number, since 2×3118917881² = 19455297496843060322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3118917889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1559458940 + 1559458941.

It is an arithmetic number, because the mean of its divisors is an integer number (1559458941).

Almost surely, 2^3118917881 is an apocalyptic number.

It is an amenable number.

3118917881 is a deficient number, since it is larger than the sum of its proper divisors (1).

3118917881 is an equidigital number, since it uses as much as digits as its factorization.

3118917881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 47.

The square root of 3118917881 is about 55847.2728161367. The cubic root of 3118917881 is about 1461.0597611590.

The spelling of 3118917881 in words is "three billion, one hundred eighteen million, nine hundred seventeen thousand, eight hundred eighty-one".