78996817 has 8 divisors (see below), whose sum is σ = 79928640. Its totient is φ = 78070800.

The previous prime is 78996787. The next prime is 78996821. The reversal of 78996817 is 71869987.

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 78996817 - 2⁷ = 78996689 is a prime.

It is a super-2 number, since 2×78996817² = 12480994192262978, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78996857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29692 + ... + 32242.

It is an arithmetic number, because the mean of its divisors is an integer number (9991080).

Almost surely, 2^78996817 is an apocalyptic number.

It is an amenable number.

78996817 is a deficient number, since it is larger than the sum of its proper divisors (931823).

78996817 is a wasteful number, since it uses less digits than its factorization.

78996817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2903.

The product of its digits is 1524096, while the sum is 55.

The square root of 78996817 is about 8888.0153577725. The cubic root of 78996817 is about 429.0782798636.

The spelling of 78996817 in words is "seventy-eight million, nine hundred ninety-six thousand, eight hundred seventeen".