493506857 has 4 divisors (see below), whose sum is σ = 501871440. Its totient is φ = 485142276.

The previous prime is 493506841. The next prime is 493506859. The reversal of 493506857 is 758605394.

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 493506857 - 2⁴ = 493506841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (493506859) 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, 4182203 + ... + 4182320.

It is an arithmetic number, because the mean of its divisors is an integer number (125467860).

Almost surely, 2^493506857 is an apocalyptic number.

It is an amenable number.

493506857 is a deficient number, since it is larger than the sum of its proper divisors (8364583).

493506857 is an equidigital number, since it uses as much as digits as its factorization.

493506857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8364582.

The product of its (nonzero) digits is 907200, while the sum is 47.

The square root of 493506857 is about 22215.0142246184. The cubic root of 493506857 is about 790.2498045671.

The spelling of 493506857 in words is "four hundred ninety-three million, five hundred six thousand, eight hundred fifty-seven".