190591 has 2 divisors, whose sum is σ = 190592. Its totient is φ = 190590.

The previous prime is 190583. The next prime is 190607. The reversal of 190591 is 195091.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 190591 - 2³ = 190583 is a prime.

190591 is a lucky number.

It is a plaindrome in base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (190391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95295 + 95296.

It is an arithmetic number, because the mean of its divisors is an integer number (95296).

2¹⁹⁰⁵⁹¹ is an apocalyptic number.

190591 is a deficient number, since it is larger than the sum of its proper divisors (1).

190591 is an equidigital number, since it uses as much as digits as its factorization.

190591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 405, while the sum is 25.

The square root of 190591 is about 436.5672914912. The cubic root of 190591 is about 57.5485160785.

The spelling of 190591 in words is "one hundred ninety thousand, five hundred ninety-one".