78334109 has 8 divisors (see below), whose sum is σ = 90658560. Its totient is φ = 66293136.

The previous prime is 78334099. The next prime is 78334121. The reversal of 78334109 is 90143387.

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

It is not a de Polignac number, because 78334109 - 2¹⁶ = 78268573 is a prime.

It is a super-2 number, since 2×78334109² = 12272465265647762, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78334609) 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, 70274 + ... + 71379.

It is an arithmetic number, because the mean of its divisors is an integer number (11332320).

Almost surely, 2^78334109 is an apocalyptic number.

78334109 is a gapful number since it is divisible by the number (79) formed by its first and last digit.

It is an amenable number.

78334109 is a deficient number, since it is larger than the sum of its proper divisors (12324451).

78334109 is a wasteful number, since it uses less digits than its factorization.

78334109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141739.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 78334109 is about 8850.6558514045. The cubic root of 78334109 is about 427.8750563323.

The spelling of 78334109 in words is "seventy-eight million, three hundred thirty-four thousand, one hundred nine".