2597631 has 4 divisors (see below), whose sum is σ = 3463512. Its totient is φ = 1731752.

The previous prime is 2597629. The next prime is 2597641. The reversal of 2597631 is 1367952.

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 2597631 - 2¹ = 2597629 is a prime.

It is a super-2 number, since 2×2597631² = 13495373624322, which contains 22 as substring.

It is a D-number.

2597631 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2597592 and 2597601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2597611) 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, 432936 + ... + 432941.

It is an arithmetic number, because the mean of its divisors is an integer number (865878).

2^2597631 is an apocalyptic number.

2597631 is a deficient number, since it is larger than the sum of its proper divisors (865881).

2597631 is an equidigital number, since it uses as much as digits as its factorization.

2597631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865880.

The product of its digits is 11340, while the sum is 33.

The square root of 2597631 is about 1611.7167865354. The cubic root of 2597631 is about 137.4651107072.

The spelling of 2597631 in words is "two million, five hundred ninety-seven thousand, six hundred thirty-one".