2391089 has 2 divisors, whose sum is σ = 2391090. Its totient is φ = 2391088.

The previous prime is 2391083. The next prime is 2391091. The reversal of 2391089 is 9801932.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1420864 + 970225 = 1192^2 + 985^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2391089 is a prime.

It is a Sophie Germain prime.

Together with 2391091, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2391083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1195544 + 1195545.

It is an arithmetic number, because the mean of its divisors is an integer number (1195545).

2^2391089 is an apocalyptic number.

It is an amenable number.

2391089 is a deficient number, since it is larger than the sum of its proper divisors (1).

2391089 is an equidigital number, since it uses as much as digits as its factorization.

2391089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 2391089 is about 1546.3146510332. The cubic root of 2391089 is about 133.7206812611.

The spelling of 2391089 in words is "two million, three hundred ninety-one thousand, eighty-nine".