494221999 has 8 divisors (see below), whose sum is σ = 515968992. Its totient is φ = 472496640.

The previous prime is 494221991. The next prime is 494222009. The reversal of 494221999 is 999122494.

It is a happy number.

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 494221999 - 2³ = 494221991 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 (494221991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56479 + ... + 64639.

It is an arithmetic number, because the mean of its divisors is an integer number (64496124).

Almost surely, 2^494221999 is an apocalyptic number.

494221999 is a deficient number, since it is larger than the sum of its proper divisors (21746993).

494221999 is a wasteful number, since it uses less digits than its factorization.

494221999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10817.

The product of its digits is 419904, while the sum is 49.

The square root of 494221999 is about 22231.1043135513. The cubic root of 494221999 is about 790.6313379777.

The spelling of 494221999 in words is "four hundred ninety-four million, two hundred twenty-one thousand, nine hundred ninety-nine".