490366921 has 8 divisors (see below), whose sum is σ = 566413344. Its totient is φ = 419565120.

The previous prime is 490366859. The next prime is 490366927. The reversal of 490366921 is 129663094.

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

It is a cyclic number.

It is not a de Polignac number, because 490366921 - 2¹¹ = 490364873 is a prime.

It is a super-4 number, since 4×490366921⁴ (a number of 36 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (490366927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1310955 + ... + 1311328.

It is an arithmetic number, because the mean of its divisors is an integer number (70801668).

Almost surely, 2^490366921 is an apocalyptic number.

It is an amenable number.

490366921 is a deficient number, since it is larger than the sum of its proper divisors (76046423).

490366921 is a wasteful number, since it uses less digits than its factorization.

490366921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2622311.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 490366921 is about 22144.2299708073. The cubic root of 490366921 is about 788.5702500692.

It can be divided in two parts, 4903 and 66921, that added together give a square (71824 = 268²).

The spelling of 490366921 in words is "four hundred ninety million, three hundred sixty-six thousand, nine hundred twenty-one".