605890321 has 2 divisors, whose sum is σ = 605890322. Its totient is φ = 605890320.

The previous prime is 605890303. The next prime is 605890349. The reversal of 605890321 is 123098506.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 571210000 + 34680321 = 23900^2 + 5889^2 .

It is a cyclic number.

It is not a de Polignac number, because 605890321 - 2⁷ = 605890193 is a prime.

It is not a weakly prime, because it can be changed into another prime (605890361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302945160 + 302945161.

It is an arithmetic number, because the mean of its divisors is an integer number (302945161).

Almost surely, 2^605890321 is an apocalyptic number.

It is an amenable number.

605890321 is a deficient number, since it is larger than the sum of its proper divisors (1).

605890321 is an equidigital number, since it uses as much as digits as its factorization.

605890321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 605890321 is about 24614.8394469678. The cubic root of 605890321 is about 846.1837317770.

The spelling of 605890321 in words is "six hundred five million, eight hundred ninety thousand, three hundred twenty-one".