268451591 has 2 divisors, whose sum is σ = 268451592. Its totient is φ = 268451590.

The previous prime is 268451549. The next prime is 268451609. The reversal of 268451591 is 195154862.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 268451591 - 2⁶ = 268451527 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268451531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134225795 + 134225796.

It is an arithmetic number, because the mean of its divisors is an integer number (134225796).

Almost surely, 2^268451591 is an apocalyptic number.

268451591 is a deficient number, since it is larger than the sum of its proper divisors (1).

268451591 is an equidigital number, since it uses as much as digits as its factorization.

268451591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86400, while the sum is 41.

The square root of 268451591 is about 16384.4923937240. The cubic root of 268451591 is about 645.0925020068.

The spelling of 268451591 in words is "two hundred sixty-eight million, four hundred fifty-one thousand, five hundred ninety-one".