290091 has 4 divisors (see below), whose sum is σ = 386792. Its totient is φ = 193392.

The previous prime is 290083. The next prime is 290107. The reversal of 290091 is 190092.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 290091 - 2³ = 290083 is a prime.

It is a D-number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 290091.

It is not an unprimeable number, because it can be changed into a prime (290011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48346 + ... + 48351.

It is an arithmetic number, because the mean of its divisors is an integer number (96698).

2²⁹⁰⁰⁹¹ is an apocalyptic number.

290091 is a deficient number, since it is larger than the sum of its proper divisors (96701).

290091 is an equidigital number, since it uses as much as digits as its factorization.

290091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96700.

The product of its (nonzero) digits is 162, while the sum is 21.

The square root of 290091 is about 538.6009654652. The cubic root of 290091 is about 66.1979821889.

Subtracting from 290091 its reverse (190092), we obtain a palindrome (99999).

The spelling of 290091 in words is "two hundred ninety thousand, ninety-one".