2385316991 has 4 divisors (see below), whose sum is σ = 2385641832. Its totient is φ = 2384992152.

The previous prime is 2385316987. The next prime is 2385317003. The reversal of 2385316991 is 1996135832.

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

It is a cyclic number.

It is not a de Polignac number, because 2385316991 - 2² = 2385316987 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 (2385316891) 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 3 ways as a sum of consecutive naturals, for example, 151145 + ... + 166178.

It is an arithmetic number, because the mean of its divisors is an integer number (596410458).

Almost surely, 2^2385316991 is an apocalyptic number.

2385316991 is a deficient number, since it is larger than the sum of its proper divisors (324841).

2385316991 is an equidigital number, since it uses as much as digits as its factorization.

2385316991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324840.

The product of its digits is 349920, while the sum is 47.

The square root of 2385316991 is about 48839.7071141914. The cubic root of 2385316991 is about 1336.1299547816.

The spelling of 2385316991 in words is "two billion, three hundred eighty-five million, three hundred sixteen thousand, nine hundred ninety-one".