2381336991 has 18 divisors (see below), whose sum is σ = 3780838880. Its totient is φ = 1443233880.

The previous prime is 2381336987. The next prime is 2381337037. The reversal of 2381336991 is 1996331832.

It is not a de Polignac number, because 2381336991 - 2² = 2381336987 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 (2381337991) 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 17 ways as a sum of consecutive naturals, for example, 1092271 + ... + 1094448.

Almost surely, 2^2381336991 is an apocalyptic number.

2381336991 is a deficient number, since it is larger than the sum of its proper divisors (1399501889).

2381336991 is a wasteful number, since it uses less digits than its factorization.

2381336991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2186747 (or 2186733 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 2381336991 is about 48798.9445685048. The cubic root of 2381336991 is about 1335.3864117306.

The spelling of 2381336991 in words is "two billion, three hundred eighty-one million, three hundred thirty-six thousand, nine hundred ninety-one".