78695845 has 4 divisors (see below), whose sum is σ = 94435020. Its totient is φ = 62956672.

The previous prime is 78695843. The next prime is 78695863. The reversal of 78695845 is 54859687.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31787044 + 46908801 = 5638^2 + 6849^2 .

It is a cyclic number.

It is not a de Polignac number, because 78695845 - 2¹ = 78695843 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78695792 and 78695801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78695843) 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 3 ways as a sum of consecutive naturals, for example, 7869580 + ... + 7869589.

It is an arithmetic number, because the mean of its divisors is an integer number (23608755).

Almost surely, 2^78695845 is an apocalyptic number.

It is an amenable number.

78695845 is a deficient number, since it is larger than the sum of its proper divisors (15739175).

78695845 is a wasteful number, since it uses less digits than its factorization.

78695845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15739174.

The product of its digits is 2419200, while the sum is 52.

The square root of 78695845 is about 8871.0678613118. The cubic root of 78695845 is about 428.5326675791.

The spelling of 78695845 in words is "seventy-eight million, six hundred ninety-five thousand, eight hundred forty-five".