8380399491 has 12 divisors (see below), whose sum is σ = 12216078160. Its totient is φ = 5535676080.

The previous prime is 8380399481. The next prime is 8380399493. The reversal of 8380399491 is 1949930838.

It is not a de Polignac number, because 8380399491 - 2⁵ = 8380399459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8380399493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4270375 + ... + 4272336.

Almost surely, 2^8380399491 is an apocalyptic number.

8380399491 is a deficient number, since it is larger than the sum of its proper divisors (3835678669).

8380399491 is a wasteful number, since it uses less digits than its factorization.

8380399491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8542826 (or 8542823 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 54.

The square root of 8380399491 is about 91544.5219060103. The cubic root of 8380399491 is about 2031.2103801964.

The spelling of 8380399491 in words is "eight billion, three hundred eighty million, three hundred ninety-nine thousand, four hundred ninety-one".