290825621 has 2 divisors, whose sum is σ = 290825622. Its totient is φ = 290825620.

The previous prime is 290825611. The next prime is 290825653. The reversal of 290825621 is 126528092.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 268632100 + 22193521 = 16390^2 + 4711^2 .

It is a cyclic number.

It is not a de Polignac number, because 290825621 - 2¹⁴ = 290809237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (290825611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145412810 + 145412811.

It is an arithmetic number, because the mean of its divisors is an integer number (145412811).

Almost surely, 2^290825621 is an apocalyptic number.

It is an amenable number.

290825621 is a deficient number, since it is larger than the sum of its proper divisors (1).

290825621 is an equidigital number, since it uses as much as digits as its factorization.

290825621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 290825621 is about 17053.6102042940. The cubic root of 290825621 is about 662.5381459464.

The spelling of 290825621 in words is "two hundred ninety million, eight hundred twenty-five thousand, six hundred twenty-one".