2990681 has 4 divisors (see below), whose sum is σ = 2997264. Its totient is φ = 2984100.

The previous prime is 2990677. The next prime is 2990707. The reversal of 2990681 is 1860992.

2990681 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2990681 - 2² = 2990677 is a prime.

It is a super-2 number, since 2×2990681² = 17888345687522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2990381) 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, 2555 + ... + 3536.

It is an arithmetic number, because the mean of its divisors is an integer number (749316).

2^2990681 is an apocalyptic number.

It is an amenable number.

2990681 is a deficient number, since it is larger than the sum of its proper divisors (6583).

2990681 is an equidigital number, since it uses as much as digits as its factorization.

2990681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6582.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 2990681 is about 1729.3585516023. The cubic root of 2990681 is about 144.0754652027.

The spelling of 2990681 in words is "two million, nine hundred ninety thousand, six hundred eighty-one".