290920090121 has 4 divisors (see below), whose sum is σ = 290922352644. Its totient is φ = 290917827600.

The previous prime is 290920090067. The next prime is 290920090207. The reversal of 290920090121 is 121090029092.

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 174338816521 + 116581273600 = 417539^2 + 341440^2 .

It is a cyclic number.

It is not a de Polignac number, because 290920090121 - 2⁶ = 290920090057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (290920090421) 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, 925970 + ... + 1199691.

It is an arithmetic number, because the mean of its divisors is an integer number (72730588161).

Almost surely, 2^290920090121 is an apocalyptic number.

It is an amenable number.

290920090121 is a deficient number, since it is larger than the sum of its proper divisors (2262523).

290920090121 is a wasteful number, since it uses less digits than its factorization.

290920090121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2262522.

The product of its (nonzero) digits is 5832, while the sum is 35.

The spelling of 290920090121 in words is "two hundred ninety billion, nine hundred twenty million, ninety thousand, one hundred twenty-one".