290900121 has 4 divisors (see below), whose sum is σ = 387866832. Its totient is φ = 193933412.

The previous prime is 290900087. The next prime is 290900147. The reversal of 290900121 is 121009092.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 290900121 - 2¹⁰ = 290899097 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 290900091 and 290900100.

It is not an unprimeable number, because it can be changed into a prime (290900191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48483351 + ... + 48483356.

It is an arithmetic number, because the mean of its divisors is an integer number (96966708).

Almost surely, 2^290900121 is an apocalyptic number.

It is an amenable number.

290900121 is a deficient number, since it is larger than the sum of its proper divisors (96966711).

290900121 is an equidigital number, since it uses as much as digits as its factorization.

290900121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96966710.

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 290900121 is about 17055.7943526533. The cubic root of 290900121 is about 662.5947146416.

The spelling of 290900121 in words is "two hundred ninety million, nine hundred thousand, one hundred twenty-one".