2491604439 has 16 divisors (see below), whose sum is σ = 3518691840. Its totient is φ = 1562856320.

The previous prime is 2491604393. The next prime is 2491604441. The reversal of 2491604439 is 9344061942.

It is a cyclic number.

It is not a de Polignac number, because 2491604439 - 2⁹ = 2491603927 is a prime.

It is a super-3 number, since 3×2491604439³ (a number of 29 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2491604439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2491604459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 211474 + ... + 222944.

It is an arithmetic number, because the mean of its divisors is an integer number (219918240).

Almost surely, 2^2491604439 is an apocalyptic number.

2491604439 is a deficient number, since it is larger than the sum of its proper divisors (1027087401).

2491604439 is a wasteful number, since it uses less digits than its factorization.

2491604439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15750.

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 2491604439 is about 49915.9737859535. The cubic root of 2491604439 is about 1355.6878338549.

The spelling of 2491604439 in words is "two billion, four hundred ninety-one million, six hundred four thousand, four hundred thirty-nine".