78866193 has 16 divisors (see below), whose sum is σ = 121530240. Its totient is φ = 44558976.

The previous prime is 78866191. The next prime is 78866209. The reversal of 78866193 is 39166887.

It is not a de Polignac number, because 78866193 - 2¹ = 78866191 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78866191) 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 15 ways as a sum of consecutive naturals, for example, 19230 + ... + 22967.

It is an arithmetic number, because the mean of its divisors is an integer number (7595640).

Almost surely, 2^78866193 is an apocalyptic number.

It is an amenable number.

78866193 is a deficient number, since it is larger than the sum of its proper divisors (42664047).

78866193 is a wasteful number, since it uses less digits than its factorization.

78866193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42296.

The product of its digits is 435456, while the sum is 48.

The square root of 78866193 is about 8880.6639954454. The cubic root of 78866193 is about 428.8416507429.

The spelling of 78866193 in words is "seventy-eight million, eight hundred sixty-six thousand, one hundred ninety-three".