2622991 has 4 divisors (see below), whose sum is σ = 2997712. Its totient is φ = 2248272.

The previous prime is 2622959. The next prime is 2623039. The reversal of 2622991 is 1992262.

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

It is a cyclic number.

It is not a de Polignac number, because 2622991 - 2⁵ = 2622959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2622911) 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, 187350 + ... + 187363.

It is an arithmetic number, because the mean of its divisors is an integer number (749428).

2^2622991 is an apocalyptic number.

2622991 is a deficient number, since it is larger than the sum of its proper divisors (374721).

2622991 is an equidigital number, since it uses as much as digits as its factorization.

2622991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374720.

The product of its digits is 3888, while the sum is 31.

The square root of 2622991 is about 1619.5650650715. The cubic root of 2622991 is about 137.9110082269.

The spelling of 2622991 in words is "two million, six hundred twenty-two thousand, nine hundred ninety-one".