2990881 has 2 divisors, whose sum is σ = 2990882. Its totient is φ = 2990880.

The previous prime is 2990879. The next prime is 2990893. The reversal of 2990881 is 1880992.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2944656 + 46225 = 1716^2 + 215^2 .

It is a cyclic number.

It is not a de Polignac number, because 2990881 - 2¹ = 2990879 is a prime.

It is a super-2 number, since 2×2990881² = 17890738312322, which contains 22 as substring.

Together with 2990879, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2990881.

It is not a weakly prime, because it can be changed into another prime (2990831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1495440 + 1495441.

It is an arithmetic number, because the mean of its divisors is an integer number (1495441).

2^2990881 is an apocalyptic number.

It is an amenable number.

2990881 is a deficient number, since it is larger than the sum of its proper divisors (1).

2990881 is an equidigital number, since it uses as much as digits as its factorization.

2990881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 2990881 is about 1729.4163755441. The cubic root of 2990881 is about 144.0786767846.

The spelling of 2990881 in words is "two million, nine hundred ninety thousand, eight hundred eighty-one".