2813239 has 16 divisors (see below), whose sum is σ = 3354624. Its totient is φ = 2325600.

The previous prime is 2813227. The next prime is 2813249. The reversal of 2813239 is 9323182.

It is a cyclic number.

It is not a de Polignac number, because 2813239 - 2⁵ = 2813207 is a prime.

It is a super-2 number, since 2×2813239² = 15828627342242, which contains 22 as substring.

2813239 is a lucky number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2813249) 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, 14634 + ... + 14824.

It is an arithmetic number, because the mean of its divisors is an integer number (209664).

2^2813239 is an apocalyptic number.

2813239 is a deficient number, since it is larger than the sum of its proper divisors (541385).

2813239 is a wasteful number, since it uses less digits than its factorization.

2813239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318.

The product of its digits is 2592, while the sum is 28.

The square root of 2813239 is about 1677.2712958851. The cubic root of 2813239 is about 141.1677663717.

The spelling of 2813239 in words is "two million, eight hundred thirteen thousand, two hundred thirty-nine".