493021 has 2 divisors, whose sum is σ = 493022. Its totient is φ = 493020.

The previous prime is 493013. The next prime is 493027. The reversal of 493021 is 120394.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 290521 + 202500 = 539^2 + 450^2 .

It is a cyclic number.

It is not a de Polignac number, because 493021 - 2³ = 493013 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 493021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (493027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246510 + 246511.

It is an arithmetic number, because the mean of its divisors is an integer number (246511).

2⁴⁹³⁰²¹ is an apocalyptic number.

It is an amenable number.

493021 is a deficient number, since it is larger than the sum of its proper divisors (1).

493021 is an equidigital number, since it uses as much as digits as its factorization.

493021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 493021 is about 702.1545413938. The cubic root of 493021 is about 78.9990386039. Note that the first 3 decimals are identical.

It can be divided in two parts, 4 and 93021, that added together give a square (93025 = 305²).

The spelling of 493021 in words is "four hundred ninety-three thousand, twenty-one".