493762021 has 4 divisors (see below), whose sum is σ = 495683532. Its totient is φ = 491840512.

The previous prime is 493762007. The next prime is 493762037. The reversal of 493762021 is 120267394.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 399400225 + 94361796 = 19985^2 + 9714^2 .

It is a cyclic number.

It is not a de Polignac number, because 493762021 - 2⁹ = 493761509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (493762051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 960370 + ... + 960883.

It is an arithmetic number, because the mean of its divisors is an integer number (123920883).

Almost surely, 2^493762021 is an apocalyptic number.

It is an amenable number.

493762021 is a deficient number, since it is larger than the sum of its proper divisors (1921511).

493762021 is a wasteful number, since it uses less digits than its factorization.

493762021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1921510.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 493762021 is about 22220.7565352758. The cubic root of 493762021 is about 790.3859786685.

The spelling of 493762021 in words is "four hundred ninety-three million, seven hundred sixty-two thousand, twenty-one".