2391859 has 2 divisors, whose sum is σ = 2391860. Its totient is φ = 2391858.

The previous prime is 2391847. The next prime is 2391863. The reversal of 2391859 is 9581932.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2391859 - 2⁵ = 2391827 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2391889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1195929 + 1195930.

It is an arithmetic number, because the mean of its divisors is an integer number (1195930).

2^2391859 is an apocalyptic number.

2391859 is a deficient number, since it is larger than the sum of its proper divisors (1).

2391859 is an equidigital number, since it uses as much as digits as its factorization.

2391859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 37.

The square root of 2391859 is about 1546.5636100723. The cubic root of 2391859 is about 133.7350336996.

The spelling of 2391859 in words is "two million, three hundred ninety-one thousand, eight hundred fifty-nine".