78636117 has 16 divisors (see below), whose sum is σ = 126133760. Its totient is φ = 42569712.

The previous prime is 78636097. The next prime is 78636127. The reversal of 78636117 is 71163687.

It is not a de Polignac number, because 78636117 - 2¹⁶ = 78570581 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 (78636127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98143 + ... + 98940.

It is an arithmetic number, because the mean of its divisors is an integer number (7883360).

Almost surely, 2^78636117 is an apocalyptic number.

It is an amenable number.

78636117 is a deficient number, since it is larger than the sum of its proper divisors (47497643).

78636117 is a wasteful number, since it uses less digits than its factorization.

78636117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197112.

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

The square root of 78636117 is about 8867.7007730302. The cubic root of 78636117 is about 428.4242252706.

The spelling of 78636117 in words is "seventy-eight million, six hundred thirty-six thousand, one hundred seventeen".