490323921 has 8 divisors (see below), whose sum is σ = 654080544. Its totient is φ = 326724960.

The previous prime is 490323907. The next prime is 490323923. The reversal of 490323921 is 129323094.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 490323921 - 2¹⁹ = 489799633 is a prime.

It is a super-4 number, since 4×490323921⁴ (a number of 36 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (490323923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31956 + ... + 44741.

It is an arithmetic number, because the mean of its divisors is an integer number (81760068).

Almost surely, 2^490323921 is an apocalyptic number.

It is an amenable number.

490323921 is a deficient number, since it is larger than the sum of its proper divisors (163756623).

490323921 is a wasteful number, since it uses less digits than its factorization.

490323921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78831.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 490323921 is about 22143.2590419748. The cubic root of 490323921 is about 788.5471996346.

The spelling of 490323921 in words is "four hundred ninety million, three hundred twenty-three thousand, nine hundred twenty-one".