2890981 has 4 divisors (see below), whose sum is σ = 2990700. Its totient is φ = 2791264.

The previous prime is 2890961. The next prime is 2890997. The reversal of 2890981 is 1890982.

2890981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1288225 + 1602756 = 1135^2 + 1266^2 .

It is a cyclic number.

It is not a de Polignac number, because 2890981 - 2⁵ = 2890949 is a prime.

It is a super-2 number, since 2×2890981² = 16715542284722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2890981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2890961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49816 + ... + 49873.

It is an arithmetic number, because the mean of its divisors is an integer number (747675).

2^2890981 is an apocalyptic number.

It is an amenable number.

2890981 is a deficient number, since it is larger than the sum of its proper divisors (99719).

2890981 is an equidigital number, since it uses as much as digits as its factorization.

2890981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99718.

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

The square root of 2890981 is about 1700.2885049309. The cubic root of 2890981 is about 142.4563280556.

Subtracting from 2890981 its reverse (1890982), we obtain a palindrome (999999).

The spelling of 2890981 in words is "two million, eight hundred ninety thousand, nine hundred eighty-one".