492323721 has 4 divisors (see below), whose sum is σ = 656431632. Its totient is φ = 328215812.

The previous prime is 492323707. The next prime is 492323737. The reversal of 492323721 is 127323294.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-492323721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (492323761) 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 in 3 ways as a sum of consecutive naturals, for example, 82053951 + ... + 82053956.

It is an arithmetic number, because the mean of its divisors is an integer number (164107908).

Almost surely, 2^492323721 is an apocalyptic number.

It is an amenable number.

492323721 is a deficient number, since it is larger than the sum of its proper divisors (164107911).

492323721 is a wasteful number, since it uses less digits than its factorization.

492323721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164107910.

The product of its digits is 18144, while the sum is 33.

The square root of 492323721 is about 22188.3690477691. The cubic root of 492323721 is about 789.6177828460.

The spelling of 492323721 in words is "four hundred ninety-two million, three hundred twenty-three thousand, seven hundred twenty-one".