494203991 has 8 divisors (see below), whose sum is σ = 528357024. Its totient is φ = 460615680.

The previous prime is 494203987. The next prime is 494204017. The reversal of 494203991 is 199302494.

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

It is not a de Polignac number, because 494203991 - 2² = 494203987 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 (494203981) 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, 139370 + ... + 142871.

It is an arithmetic number, because the mean of its divisors is an integer number (66044628).

Almost surely, 2^494203991 is an apocalyptic number.

494203991 is a deficient number, since it is larger than the sum of its proper divisors (34153033).

494203991 is a wasteful number, since it uses less digits than its factorization.

494203991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282361.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 494203991 is about 22230.6992917452. The cubic root of 494203991 is about 790.6217350988.

The spelling of 494203991 in words is "four hundred ninety-four million, two hundred three thousand, nine hundred ninety-one".