2920981 has 4 divisors (see below), whose sum is σ = 3338272. Its totient is φ = 2503692.

The previous prime is 2920979. The next prime is 2920987. The reversal of 2920981 is 1890292.

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 2920981 - 2¹ = 2920979 is a prime.

It is a super-2 number, since 2×2920981² = 17064260004722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2920987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208635 + ... + 208648.

It is an arithmetic number, because the mean of its divisors is an integer number (834568).

2^2920981 is an apocalyptic number.

It is an amenable number.

2920981 is a deficient number, since it is larger than the sum of its proper divisors (417291).

2920981 is an equidigital number, since it uses as much as digits as its factorization.

2920981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417290.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 2920981 is about 1709.0877683724. The cubic root of 2920981 is about 142.9473945419.

The spelling of 2920981 in words is "two million, nine hundred twenty thousand, nine hundred eighty-one".