817946994 has 8 divisors (see below), whose sum is σ = 1635894000. Its totient is φ = 272648996.

The previous prime is 817946977. The next prime is 817947019. The reversal of 817946994 is 499649718.

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

817946994 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68162244 + ... + 68162255.

It is an arithmetic number, because the mean of its divisors is an integer number (204486750).

Almost surely, 2^817946994 is an apocalyptic number.

817946994 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

817946994 is a wasteful number, since it uses less digits than its factorization.

817946994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136324504.

The product of its digits is 3919104, while the sum is 57.

The square root of 817946994 is about 28599.7726214738. The cubic root of 817946994 is about 935.2083739688.

It can be divided in two parts, 81794 and 6994, that added together give a palindrome (88788).

The spelling of 817946994 in words is "eight hundred seventeen million, nine hundred forty-six thousand, nine hundred ninety-four".