2591389 has 2 divisors, whose sum is σ = 2591390. Its totient is φ = 2591388.

The previous prime is 2591363. The next prime is 2591401. The reversal of 2591389 is 9831952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2427364 + 164025 = 1558^2 + 405^2 .

It is a cyclic number.

It is not a de Polignac number, because 2591389 - 2⁷ = 2591261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2591189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1295694 + 1295695.

It is an arithmetic number, because the mean of its divisors is an integer number (1295695).

2^2591389 is an apocalyptic number.

It is an amenable number.

2591389 is a deficient number, since it is larger than the sum of its proper divisors (1).

2591389 is an equidigital number, since it uses as much as digits as its factorization.

2591389 is an evil number, because the sum of its binary digits is even.

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

The square root of 2591389 is about 1609.7791774029. The cubic root of 2591389 is about 137.3549147335.

The spelling of 2591389 in words is "two million, five hundred ninety-one thousand, three hundred eighty-nine".