2658391 has 2 divisors, whose sum is σ = 2658392. Its totient is φ = 2658390.

The previous prime is 2658379. The next prime is 2658437. The reversal of 2658391 is 1938562.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2658391 - 2⁷ = 2658263 is a prime.

2658391 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2658301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1329195 + 1329196.

It is an arithmetic number, because the mean of its divisors is an integer number (1329196).

2^2658391 is an apocalyptic number.

2658391 is a deficient number, since it is larger than the sum of its proper divisors (1).

2658391 is an equidigital number, since it uses as much as digits as its factorization.

2658391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 34.

The square root of 2658391 is about 1630.4572978156. The cubic root of 2658391 is about 138.5286555504.

The spelling of 2658391 in words is "two million, six hundred fifty-eight thousand, three hundred ninety-one".