290550969 has 28 divisors (see below), whose sum is σ = 446298132. Its totient is φ = 188956800.

The previous prime is 290550947. The next prime is 290551013. The reversal of 290550969 is 969055092.

290550969 is a `hidden beast` number, since 2 + 9 + 0 + 550 + 96 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10323369 + 280227600 = 3213^2 + 16740^2 .

It is not a de Polignac number, because 290550969 - 2⁹ = 290550457 is a prime.

It is a super-2 number, since 2×290550969² = 168839731173677922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (290551969) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 25029 + ... + 34749.

It is an arithmetic number, because the mean of its divisors is an integer number (15939219).

Almost surely, 2^290550969 is an apocalyptic number.

It is an amenable number.

290550969 is a deficient number, since it is larger than the sum of its proper divisors (155747163).

290550969 is an frugal number, since it uses more digits than its factorization.

290550969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9780 (or 9765 counting only the distinct ones).

The product of its (nonzero) digits is 218700, while the sum is 45.

The square root of 290550969 is about 17045.5556964271. Note that the first 3 decimals coincide. The cubic root of 290550969 is about 662.3295160707.

The spelling of 290550969 in words is "two hundred ninety million, five hundred fifty thousand, nine hundred sixty-nine".