2659631 has 4 divisors (see below), whose sum is σ = 2864232. Its totient is φ = 2455032.

The previous prime is 2659627. The next prime is 2659637. The reversal of 2659631 is 1369562.

It is a happy number.

2659631 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 is a cyclic number.

It is not a de Polignac number, because 2659631 - 2² = 2659627 is a prime.

It is a super-2 number, since 2×2659631² = 14147274112322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2659637) 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, 102281 + ... + 102306.

It is an arithmetic number, because the mean of its divisors is an integer number (716058).

2^2659631 is an apocalyptic number.

2659631 is a deficient number, since it is larger than the sum of its proper divisors (204601).

2659631 is a wasteful number, since it uses less digits than its factorization.

2659631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204600.

The product of its digits is 9720, while the sum is 32.

The square root of 2659631 is about 1630.8375148984. The cubic root of 2659631 is about 138.5501909869.

The spelling of 2659631 in words is "two million, six hundred fifty-nine thousand, six hundred thirty-one".