494038021 has 8 divisors (see below), whose sum is σ = 500135040. Its totient is φ = 487953312.

The previous prime is 494037983. The next prime is 494038063. The reversal of 494038021 is 120830494.

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 494038021 - 2⁷ = 494037893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (494038081) 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, 97476 + ... + 102418.

It is an arithmetic number, because the mean of its divisors is an integer number (62516880).

Almost surely, 2^494038021 is an apocalyptic number.

It is an amenable number.

494038021 is a deficient number, since it is larger than the sum of its proper divisors (6097019).

494038021 is a wasteful number, since it uses less digits than its factorization.

494038021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6155.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 494038021 is about 22226.9660772675. The cubic root of 494038021 is about 790.5332195709.

The spelling of 494038021 in words is "four hundred ninety-four million, thirty-eight thousand, twenty-one".