290604421 has 2 divisors, whose sum is σ = 290604422. Its totient is φ = 290604420.

The previous prime is 290604367. The next prime is 290604439. The reversal of 290604421 is 124406092.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 285981921 + 4622500 = 16911^2 + 2150^2 .

It is a cyclic number.

It is not a de Polignac number, because 290604421 - 2⁹ = 290603909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 290604421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (290604481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145302210 + 145302211.

It is an arithmetic number, because the mean of its divisors is an integer number (145302211).

Almost surely, 2^290604421 is an apocalyptic number.

It is an amenable number.

290604421 is a deficient number, since it is larger than the sum of its proper divisors (1).

290604421 is an equidigital number, since it uses as much as digits as its factorization.

290604421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 290604421 is about 17047.1235403513. The cubic root of 290604421 is about 662.3701293311.

The spelling of 290604421 in words is "two hundred ninety million, six hundred four thousand, four hundred twenty-one".