78734109 has 8 divisors (see below), whose sum is σ = 105028000. Its totient is φ = 52464816.

The previous prime is 78734099. The next prime is 78734111. The reversal of 78734109 is 90143787.

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

It is not a de Polignac number, because 78734109 - 2¹³ = 78725917 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 (78734189) 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, 3474 + ... + 13020.

It is an arithmetic number, because the mean of its divisors is an integer number (13128500).

Almost surely, 2^78734109 is an apocalyptic number.

It is an amenable number.

78734109 is a deficient number, since it is larger than the sum of its proper divisors (26293891).

78734109 is a wasteful number, since it uses less digits than its factorization.

78734109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12299.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 78734109 is about 8873.2242730588. The cubic root of 78734109 is about 428.6021109621.

The spelling of 78734109 in words is "seventy-eight million, seven hundred thirty-four thousand, one hundred nine".