494928721 has 8 divisors (see below), whose sum is σ = 568476800. Its totient is φ = 422091648.

The previous prime is 494928719. The next prime is 494928727. The reversal of 494928721 is 127829494.

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

It is a cyclic number.

It is not a de Polignac number, because 494928721 - 2¹ = 494928719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (494928727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176256 + ... + 179041.

It is an arithmetic number, because the mean of its divisors is an integer number (71059600).

Almost surely, 2^494928721 is an apocalyptic number.

It is an amenable number.

494928721 is a deficient number, since it is larger than the sum of its proper divisors (73548079).

494928721 is a wasteful number, since it uses less digits than its factorization.

494928721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355503.

The product of its digits is 290304, while the sum is 46.

The square root of 494928721 is about 22246.9935272162. The cubic root of 494928721 is about 791.0080178491.

It can be divided in two parts, 4949 and 28721, that added together give a triangular number (33670 = T₂₅₉).

The spelling of 494928721 in words is "four hundred ninety-four million, nine hundred twenty-eight thousand, seven hundred twenty-one".