290565161 has 2 divisors, whose sum is σ = 290565162. Its totient is φ = 290565160.

The previous prime is 290565113. The next prime is 290565199. The reversal of 290565161 is 161565092.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190964761 + 99600400 = 13819^2 + 9980^2 .

It is a cyclic number.

It is not a de Polignac number, because 290565161 - 2⁶ = 290565097 is a prime.

It is a super-2 number, since 2×290565161² = 168856225573911842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (290565101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145282580 + 145282581.

It is an arithmetic number, because the mean of its divisors is an integer number (145282581).

Almost surely, 2^290565161 is an apocalyptic number.

It is an amenable number.

290565161 is a deficient number, since it is larger than the sum of its proper divisors (1).

290565161 is an equidigital number, since it uses as much as digits as its factorization.

290565161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 290565161 is about 17045.9719875400. The cubic root of 290565161 is about 662.3402997523.

The spelling of 290565161 in words is "two hundred ninety million, five hundred sixty-five thousand, one hundred sixty-one".