2991239499 has 4 divisors (see below), whose sum is σ = 3988319336. Its totient is φ = 1994159664.

The previous prime is 2991239497. The next prime is 2991239513. The reversal of 2991239499 is 9949321992.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2991239499 - 2¹ = 2991239497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2991239491) 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, 498539914 + ... + 498539919.

It is an arithmetic number, because the mean of its divisors is an integer number (997079834).

Almost surely, 2^2991239499 is an apocalyptic number.

2991239499 is a deficient number, since it is larger than the sum of its proper divisors (997079837).

2991239499 is an equidigital number, since it uses as much as digits as its factorization.

2991239499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997079836.

The product of its digits is 2834352, while the sum is 57.

The square root of 2991239499 is about 54692.2252152900. The cubic root of 2991239499 is about 1440.8443317077.

The spelling of 2991239499 in words is "two billion, nine hundred ninety-one million, two hundred thirty-nine thousand, four hundred ninety-nine".