78765193 has 8 divisors (see below), whose sum is σ = 87117128. Its totient is φ = 70740864.

The previous prime is 78765187. The next prime is 78765209. The reversal of 78765193 is 39156787.

It can be written as a sum of positive squares in 4 ways, for example, as 2866249 + 75898944 = 1693^2 + 8712^2 .

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 78765193 - 2⁹ = 78764681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78765163) 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, 81396 + ... + 82357.

It is an arithmetic number, because the mean of its divisors is an integer number (10889641).

Almost surely, 2^78765193 is an apocalyptic number.

It is an amenable number.

78765193 is a deficient number, since it is larger than the sum of its proper divisors (8351935).

78765193 is a wasteful number, since it uses less digits than its factorization.

78765193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163803.

The product of its digits is 317520, while the sum is 46.

The square root of 78765193 is about 8874.9756619385. The cubic root of 78765193 is about 428.6585071683.

The spelling of 78765193 in words is "seventy-eight million, seven hundred sixty-five thousand, one hundred ninety-three".