2630991 has 16 divisors (see below), whose sum is σ = 3892608. Its totient is φ = 1567200.

The previous prime is 2630989. The next prime is 2631007. The reversal of 2630991 is 1990362.

It is not a de Polignac number, because 2630991 - 2¹ = 2630989 is a prime.

It is a super-2 number, since 2×2630991² = 13844227284162, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2630921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1360 + ... + 2666.

It is an arithmetic number, because the mean of its divisors is an integer number (243288).

2^2630991 is an apocalyptic number.

2630991 is a deficient number, since it is larger than the sum of its proper divisors (1261617).

2630991 is a wasteful number, since it uses less digits than its factorization.

2630991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1382.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 2630991 is about 1622.0329836350. The cubic root of 2630991 is about 138.0510733031.

The spelling of 2630991 in words is "two million, six hundred thirty thousand, nine hundred ninety-one".