490078321 has 2 divisors, whose sum is σ = 490078322. Its totient is φ = 490078320.

The previous prime is 490078313. The next prime is 490078339. The reversal of 490078321 is 123870094.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 474586225 + 15492096 = 21785^2 + 3936^2 .

It is a cyclic number.

It is not a de Polignac number, because 490078321 - 2³ = 490078313 is a prime.

It is not a weakly prime, because it can be changed into another prime (490078301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245039160 + 245039161.

It is an arithmetic number, because the mean of its divisors is an integer number (245039161).

Almost surely, 2^490078321 is an apocalyptic number.

It is an amenable number.

490078321 is a deficient number, since it is larger than the sum of its proper divisors (1).

490078321 is an equidigital number, since it uses as much as digits as its factorization.

490078321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 490078321 is about 22137.7126415536. The cubic root of 490078321 is about 788.4155182919.

The spelling of 490078321 in words is "four hundred ninety million, seventy-eight thousand, three hundred twenty-one".