908591 has 2 divisors, whose sum is σ = 908592. Its totient is φ = 908590.

The previous prime is 908581. The next prime is 908597. The reversal of 908591 is 195809.

It is a strong prime.

It is an emirp because it is prime and its reverse (195809) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 908591 - 2⁶ = 908527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (908597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 454295 + 454296.

It is an arithmetic number, because the mean of its divisors is an integer number (454296).

2⁹⁰⁸⁵⁹¹ is an apocalyptic number.

908591 is a deficient number, since it is larger than the sum of its proper divisors (1).

908591 is an equidigital number, since it uses as much as digits as its factorization.

908591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 32.

The square root of 908591 is about 953.2003986571. The cubic root of 908591 is about 96.8551705511.

The spelling of 908591 in words is "nine hundred eight thousand, five hundred ninety-one".