290319121 has 2 divisors, whose sum is σ = 290319122. Its totient is φ = 290319120.

The previous prime is 290319109. The next prime is 290319151. The reversal of 290319121 is 121913092.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 239909121 + 50410000 = 15489^2 + 7100^2 .

It is a cyclic number.

It is not a de Polignac number, because 290319121 - 2⁵ = 290319089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 290319121.

It is not a weakly prime, because it can be changed into another prime (290319151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145159560 + 145159561.

It is an arithmetic number, because the mean of its divisors is an integer number (145159561).

Almost surely, 2^290319121 is an apocalyptic number.

It is an amenable number.

290319121 is a deficient number, since it is larger than the sum of its proper divisors (1).

290319121 is an equidigital number, since it uses as much as digits as its factorization.

290319121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 290319121 is about 17038.7535048782. The cubic root of 290319121 is about 662.1532984096.

The spelling of 290319121 in words is "two hundred ninety million, three hundred nineteen thousand, one hundred twenty-one".