290989 has 4 divisors (see below), whose sum is σ = 308124. Its totient is φ = 273856.

The previous prime is 290987. The next prime is 290993. The reversal of 290989 is 989092.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 81225 + 209764 = 285^2 + 458^2 .

It is a cyclic number.

It is not a de Polignac number, because 290989 - 2¹ = 290987 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (290987) 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, 8542 + ... + 8575.

It is an arithmetic number, because the mean of its divisors is an integer number (77031).

2²⁹⁰⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

290989 is a deficient number, since it is larger than the sum of its proper divisors (17135).

290989 is a wasteful number, since it uses less digits than its factorization.

290989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17134.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 290989 is about 539.4339625941. The cubic root of 290989 is about 66.2662188842.

The spelling of 290989 in words is "two hundred ninety thousand, nine hundred eighty-nine".