493003921 has 2 divisors, whose sum is σ = 493003922. Its totient is φ = 493003920.

The previous prime is 493003913. The next prime is 493004027. The reversal of 493003921 is 129300394.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 411643521 + 81360400 = 20289^2 + 9020^2 .

It is a cyclic number.

It is not a de Polignac number, because 493003921 - 2³ = 493003913 is a prime.

It is a super-2 number, since 2×493003921² = 486105732242748482, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (493004921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246501960 + 246501961.

It is an arithmetic number, because the mean of its divisors is an integer number (246501961).

Almost surely, 2^493003921 is an apocalyptic number.

It is an amenable number.

493003921 is a deficient number, since it is larger than the sum of its proper divisors (1).

493003921 is an equidigital number, since it uses as much as digits as its factorization.

493003921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 493003921 is about 22203.6916074782. The cubic root of 493003921 is about 789.9812637761.

The spelling of 493003921 in words is "four hundred ninety-three million, three thousand, nine hundred twenty-one".