492023309 has 4 divisors (see below), whose sum is σ = 508989660. Its totient is φ = 475056960.

The previous prime is 492023281. The next prime is 492023317. The reversal of 492023309 is 903320294.

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 187416100 + 304607209 = 13690^2 + 17453^2 .

It is a cyclic number.

It is not a de Polignac number, because 492023309 - 2²⁰ = 490974733 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (492023509) 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, 8483132 + ... + 8483189.

It is an arithmetic number, because the mean of its divisors is an integer number (127247415).

Almost surely, 2^492023309 is an apocalyptic number.

It is an amenable number.

492023309 is a deficient number, since it is larger than the sum of its proper divisors (16966351).

492023309 is a wasteful number, since it uses less digits than its factorization.

492023309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16966350.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 492023309 is about 22181.5984320337. The cubic root of 492023309 is about 789.4571440146.

The spelling of 492023309 in words is "four hundred ninety-two million, twenty-three thousand, three hundred nine".