290691 has 6 divisors (see below), whose sum is σ = 419900. Its totient is φ = 193788.

The previous prime is 290677. The next prime is 290701. The reversal of 290691 is 196092.

It is a happy number.

It is not a de Polignac number, because 290691 - 2⁵ = 290659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (290611) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16141 + ... + 16158.

2²⁹⁰⁶⁹¹ is an apocalyptic number.

290691 is a deficient number, since it is larger than the sum of its proper divisors (129209).

290691 is a wasteful number, since it uses less digits than its factorization.

290691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32305 (or 32302 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 290691 is about 539.1576763805. The cubic root of 290691 is about 66.2435902188.

The spelling of 290691 in words is "two hundred ninety thousand, six hundred ninety-one".