2439499391 has 4 divisors (see below), whose sum is σ = 2787999312. Its totient is φ = 2090999472.

The previous prime is 2439499379. The next prime is 2439499451. The reversal of 2439499391 is 1939949342.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1939949342 = 2 ⋅969974671.

It is a cyclic number.

It is not a de Polignac number, because 2439499391 - 2³⁰ = 1365757567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2439499331) 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, 174249950 + ... + 174249963.

It is an arithmetic number, because the mean of its divisors is an integer number (696999828).

Almost surely, 2^2439499391 is an apocalyptic number.

2439499391 is a deficient number, since it is larger than the sum of its proper divisors (348499921).

2439499391 is an equidigital number, since it uses as much as digits as its factorization.

2439499391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348499920.

The product of its digits is 1889568, while the sum is 53.

The square root of 2439499391 is about 49391.2886144915. The cubic root of 2439499391 is about 1346.1710232891.

The spelling of 2439499391 in words is "two billion, four hundred thirty-nine million, four hundred ninety-nine thousand, three hundred ninety-one".