2389917931 has 2 divisors, whose sum is σ = 2389917932. Its totient is φ = 2389917930.

The previous prime is 2389917917. The next prime is 2389917947. The reversal of 2389917931 is 1397199832.

2389917931 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2389917931 - 2¹¹ = 2389915883 is a prime.

It is a super-2 number, since 2×2389917931² = 11423415433830641522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2389917991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1194958965 + 1194958966.

It is an arithmetic number, because the mean of its divisors is an integer number (1194958966).

Almost surely, 2^2389917931 is an apocalyptic number.

2389917931 is a deficient number, since it is larger than the sum of its proper divisors (1).

2389917931 is an equidigital number, since it uses as much as digits as its factorization.

2389917931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 734832, while the sum is 52.

The square root of 2389917931 is about 48886.7868753920. The cubic root of 2389917931 is about 1336.9884717675.

The spelling of 2389917931 in words is "two billion, three hundred eighty-nine million, nine hundred seventeen thousand, nine hundred thirty-one".