492807257 has 4 divisors (see below), whose sum is σ = 494107920. Its totient is φ = 491506596.

The previous prime is 492807247. The next prime is 492807277. The reversal of 492807257 is 752708294.

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 not a de Polignac number, because 492807257 - 2⁸ = 492807001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (492807247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 649763 + ... + 650520.

It is an arithmetic number, because the mean of its divisors is an integer number (123526980).

Almost surely, 2^492807257 is an apocalyptic number.

It is an amenable number.

492807257 is a deficient number, since it is larger than the sum of its proper divisors (1300663).

492807257 is a wasteful number, since it uses less digits than its factorization.

492807257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1300662.

The product of its (nonzero) digits is 282240, while the sum is 44.

The square root of 492807257 is about 22199.2625327960. The cubic root of 492807257 is about 789.8762061004.

The spelling of 492807257 in words is "four hundred ninety-two million, eight hundred seven thousand, two hundred fifty-seven".