2990831 has 2 divisors, whose sum is σ = 2990832. Its totient is φ = 2990830.

The previous prime is 2990797. The next prime is 2990833. The reversal of 2990831 is 1380992.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2990831 is a prime.

It is a super-2 number, since 2×2990831² = 17890140141122, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 2990833, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2990833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1495415 + 1495416.

It is an arithmetic number, because the mean of its divisors is an integer number (1495416).

2^2990831 is an apocalyptic number.

2990831 is a deficient number, since it is larger than the sum of its proper divisors (1).

2990831 is an equidigital number, since it uses as much as digits as its factorization.

2990831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 2990831 is about 1729.4019197399. The cubic root of 2990831 is about 144.0778739026.

The spelling of 2990831 in words is "two million, nine hundred ninety thousand, eight hundred thirty-one".