493721566 has 8 divisors (see below), whose sum is σ = 797550264. Its totient is φ = 227871480.

The previous prime is 493721489. The next prime is 493721567. The reversal of 493721566 is 665127394.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (493721567) 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, 9494620 + ... + 9494671.

It is an arithmetic number, because the mean of its divisors is an integer number (99693783).

Almost surely, 2^493721566 is an apocalyptic number.

493721566 is a deficient number, since it is larger than the sum of its proper divisors (303828698).

493721566 is a wasteful number, since it uses less digits than its factorization.

493721566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18989306.

The product of its digits is 272160, while the sum is 43.

The square root of 493721566 is about 22219.8462190898. The cubic root of 493721566 is about 790.3643920629.

The spelling of 493721566 in words is "four hundred ninety-three million, seven hundred twenty-one thousand, five hundred sixty-six".