492946721 has 4 divisors (see below), whose sum is σ = 492991152. Its totient is φ = 492902292.

The previous prime is 492946709. The next prime is 492946771. The reversal of 492946721 is 127649294.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-492946721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (492946771) 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, 9986 + ... + 32948.

It is an arithmetic number, because the mean of its divisors is an integer number (123247788).

Almost surely, 2^492946721 is an apocalyptic number.

It is an amenable number.

492946721 is a deficient number, since it is larger than the sum of its proper divisors (44431).

492946721 is a wasteful number, since it uses less digits than its factorization.

492946721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44430.

The product of its digits is 217728, while the sum is 44.

The square root of 492946721 is about 22202.4034960182. The cubic root of 492946721 is about 789.9507104857.

The spelling of 492946721 in words is "four hundred ninety-two million, nine hundred forty-six thousand, seven hundred twenty-one".