290197 has 4 divisors (see below), whose sum is σ = 291276. Its totient is φ = 289120.

The previous prime is 290189. The next prime is 290201. The reversal of 290197 is 791092.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 51076 + 239121 = 226^2 + 489^2 .

It is a cyclic number.

It is not a de Polignac number, because 290197 - 2³ = 290189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (290107) 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, 243 + ... + 799.

It is an arithmetic number, because the mean of its divisors is an integer number (72819).

2²⁹⁰¹⁹⁷ is an apocalyptic number.

It is an amenable number.

290197 is a deficient number, since it is larger than the sum of its proper divisors (1079).

290197 is an equidigital number, since it uses as much as digits as its factorization.

290197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078.

The product of its (nonzero) digits is 1134, while the sum is 28.

The square root of 290197 is about 538.6993595690. The cubic root of 290197 is about 66.2060441782.

The spelling of 290197 in words is "two hundred ninety thousand, one hundred ninety-seven".