290869 has 2 divisors, whose sum is σ = 290870. Its totient is φ = 290868.

The previous prime is 290861. The next prime is 290879. The reversal of 290869 is 968092.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 288369 + 2500 = 537^2 + 50^2 .

It is a cyclic number.

It is not a de Polignac number, because 290869 - 2³ = 290861 is a prime.

It is a super-2 number, since 2×290869² = 169209550322, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (290861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145434 + 145435.

It is an arithmetic number, because the mean of its divisors is an integer number (145435).

2²⁹⁰⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

290869 is a deficient number, since it is larger than the sum of its proper divisors (1).

290869 is an equidigital number, since it uses as much as digits as its factorization.

290869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 290869 is about 539.3227234226. The cubic root of 290869 is about 66.2571085288.

The spelling of 290869 in words is "two hundred ninety thousand, eight hundred sixty-nine".