490612321 has 2 divisors, whose sum is σ = 490612322. Its totient is φ = 490612320.

The previous prime is 490612313. The next prime is 490612337. The reversal of 490612321 is 123216094.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 486864225 + 3748096 = 22065^2 + 1936^2 .

It is a cyclic number.

It is not a de Polignac number, because 490612321 - 2³ = 490612313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 490612321.

It is not a weakly prime, because it can be changed into another prime (490612301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245306160 + 245306161.

It is an arithmetic number, because the mean of its divisors is an integer number (245306161).

Almost surely, 2^490612321 is an apocalyptic number.

It is an amenable number.

490612321 is a deficient number, since it is larger than the sum of its proper divisors (1).

490612321 is an equidigital number, since it uses as much as digits as its factorization.

490612321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 490612321 is about 22149.7702245418. The cubic root of 490612321 is about 788.7017725809.

The spelling of 490612321 in words is "four hundred ninety million, six hundred twelve thousand, three hundred twenty-one".