2408398991 has 4 divisors (see below), whose sum is σ = 2441390832. Its totient is φ = 2375407152.

The previous prime is 2408398987. The next prime is 2408399003. The reversal of 2408398991 is 1998938042.

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

It is not a de Polignac number, because 2408398991 - 2² = 2408398987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2408398901) 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, 16495811 + ... + 16495956.

It is an arithmetic number, because the mean of its divisors is an integer number (610347708).

Almost surely, 2^2408398991 is an apocalyptic number.

2408398991 is a deficient number, since it is larger than the sum of its proper divisors (32991841).

2408398991 is an equidigital number, since it uses as much as digits as its factorization.

2408398991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32991840.

The product of its (nonzero) digits is 1119744, while the sum is 53.

The square root of 2408398991 is about 49075.4418319387. The cubic root of 2408398991 is about 1340.4259043805.

The spelling of 2408398991 in words is "two billion, four hundred eight million, three hundred ninety-eight thousand, nine hundred ninety-one".