2597813 has 4 divisors (see below), whose sum is σ = 2734560. Its totient is φ = 2461068.

The previous prime is 2597809. The next prime is 2597857. The reversal of 2597813 is 3187952.

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 2597813 - 2² = 2597809 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 (2597113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68345 + ... + 68382.

It is an arithmetic number, because the mean of its divisors is an integer number (683640).

2^2597813 is an apocalyptic number.

It is an amenable number.

2597813 is a deficient number, since it is larger than the sum of its proper divisors (136747).

2597813 is a wasteful number, since it uses less digits than its factorization.

2597813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136746.

The product of its digits is 15120, while the sum is 35.

The square root of 2597813 is about 1611.7732470791. The cubic root of 2597813 is about 137.4683210766.

The spelling of 2597813 in words is "two million, five hundred ninety-seven thousand, eight hundred thirteen".