290161 has 2 divisors, whose sum is σ = 290162. Its totient is φ = 290160.

The previous prime is 290141. The next prime is 290183. The reversal of 290161 is 161092.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197136 + 93025 = 444^2 + 305^2 .

It is a cyclic number.

It is not a de Polignac number, because 290161 - 2⁷ = 290033 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (290141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145080 + 145081.

It is an arithmetic number, because the mean of its divisors is an integer number (145081).

2²⁹⁰¹⁶¹ is an apocalyptic number.

It is an amenable number.

290161 is a deficient number, since it is larger than the sum of its proper divisors (1).

290161 is an equidigital number, since it uses as much as digits as its factorization.

290161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 290161 is about 538.6659447190. The cubic root of 290161 is about 66.2033063643.

The spelling of 290161 in words is "two hundred ninety thousand, one hundred sixty-one".