2779990831 has 2 divisors, whose sum is σ = 2779990832. Its totient is φ = 2779990830.

The previous prime is 2779990823. The next prime is 2779990853. The reversal of 2779990831 is 1380999772.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2779990831 - 2³ = 2779990823 is a prime.

It is a super-2 number, since 2×2779990831² = 15456698040888141122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2779900831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1389995415 + 1389995416.

It is an arithmetic number, because the mean of its divisors is an integer number (1389995416).

Almost surely, 2^2779990831 is an apocalyptic number.

2779990831 is a deficient number, since it is larger than the sum of its proper divisors (1).

2779990831 is an equidigital number, since it uses as much as digits as its factorization.

2779990831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1714608, while the sum is 55.

The square root of 2779990831 is about 52725.6183557860. The cubic root of 2779990831 is about 1406.0943220164.

The spelling of 2779990831 in words is "two billion, seven hundred seventy-nine million, nine hundred ninety thousand, eight hundred thirty-one".