290491 has 4 divisors (see below), whose sum is σ = 305800. Its totient is φ = 275184.

The previous prime is 290489. The next prime is 290497. The reversal of 290491 is 194092.

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

It is a cyclic number.

It is not a de Polignac number, because 290491 - 2¹ = 290489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (290497) 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, 7626 + ... + 7663.

It is an arithmetic number, because the mean of its divisors is an integer number (76450).

2²⁹⁰⁴⁹¹ is an apocalyptic number.

290491 is a deficient number, since it is larger than the sum of its proper divisors (15309).

290491 is a wasteful number, since it uses less digits than its factorization.

290491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15308.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 290491 is about 538.9721699680. The cubic root of 290491 is about 66.2283945212.

The spelling of 290491 in words is "two hundred ninety thousand, four hundred ninety-one".