817042099 has 8 divisors (see below), whose sum is σ = 823277520. Its totient is φ = 810825600.

The previous prime is 817042073. The next prime is 817042111. The reversal of 817042099 is 990240718.

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 817042099 - 2⁵ = 817042067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (817042069) 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, 88879 + ... + 97639.

It is an arithmetic number, because the mean of its divisors is an integer number (102909690).

Almost surely, 2^817042099 is an apocalyptic number.

817042099 is a deficient number, since it is larger than the sum of its proper divisors (6235421).

817042099 is a wasteful number, since it uses less digits than its factorization.

817042099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9461.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 817042099 is about 28583.9482752121. The cubic root of 817042099 is about 934.8633729462.

The spelling of 817042099 in words is "eight hundred seventeen million, forty-two thousand, ninety-nine".