2491839 has 24 divisors (see below), whose sum is σ = 4228640. Its totient is φ = 1384128.

The previous prime is 2491837. The next prime is 2491847. The reversal of 2491839 is 9381942.

It is not a de Polignac number, because 2491839 - 2¹ = 2491837 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2491837) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1797 + ... + 2865.

2^2491839 is an apocalyptic number.

2491839 is a deficient number, since it is larger than the sum of its proper divisors (1736801).

2491839 is a wasteful number, since it uses less digits than its factorization.

2491839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1119 (or 1116 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 2491839 is about 1578.5559857034. Note that the first 3 decimals coincide. The cubic root of 2491839 is about 135.5730374251.

The spelling of 2491839 in words is "two million, four hundred ninety-one thousand, eight hundred thirty-nine".