100591 has 2 divisors, whose sum is σ = 100592. Its totient is φ = 100590.

The previous prime is 100559. The next prime is 100609. The reversal of 100591 is 195001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 100591 - 2⁵ = 100559 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50295 + 50296.

It is an arithmetic number, because the mean of its divisors is an integer number (50296).

2¹⁰⁰⁵⁹¹ is an apocalyptic number.

100591 is a deficient number, since it is larger than the sum of its proper divisors (1).

100591 is an equidigital number, since it uses as much as digits as its factorization.

100591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45, while the sum is 16.

The square root of 100591 is about 317.1608424759. The cubic root of 100591 is about 46.5071480899.

Adding to 100591 its reverse (195001), we get a palindrome (295592).

The spelling of 100591 in words is "one hundred thousand, five hundred ninety-one".