290661996209 has 4 divisors (see below), whose sum is σ = 313020611316. Its totient is φ = 268303381104.

The previous prime is 290661996193. The next prime is 290661996217. The reversal of 290661996209 is 902699166092.

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 32923013809 + 257738982400 = 181447^2 + 507680^2 .

It is a cyclic number.

It is not a de Polignac number, because 290661996209 - 2⁴ = 290661996193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (290661996809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11179307534 + ... + 11179307559.

It is an arithmetic number, because the mean of its divisors is an integer number (78255152829).

Almost surely, 2^290661996209 is an apocalyptic number.

It is an amenable number.

290661996209 is a deficient number, since it is larger than the sum of its proper divisors (22358615107).

290661996209 is a wasteful number, since it uses less digits than its factorization.

290661996209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22358615106.

The product of its (nonzero) digits is 5668704, while the sum is 59.

The spelling of 290661996209 in words is "two hundred ninety billion, six hundred sixty-one million, nine hundred ninety-six thousand, two hundred nine".