2381791 has 2 divisors, whose sum is σ = 2381792. Its totient is φ = 2381790.

The previous prime is 2381789. The next prime is 2381807. The reversal of 2381791 is 1971832.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2381791 - 2¹ = 2381789 is a prime.

Together with 2381789, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a plaindrome in base 14 and base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2381191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1190895 + 1190896.

It is an arithmetic number, because the mean of its divisors is an integer number (1190896).

2^2381791 is an apocalyptic number.

2381791 is a deficient number, since it is larger than the sum of its proper divisors (1).

2381791 is an equidigital number, since it uses as much as digits as its factorization.

2381791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 31.

The square root of 2381791 is about 1543.3052193264. The cubic root of 2381791 is about 133.5471271472.

The spelling of 2381791 in words is "two million, three hundred eighty-one thousand, seven hundred ninety-one".