78808073 has 8 divisors (see below), whose sum is σ = 83661192. Its totient is φ = 73979136.

The previous prime is 78808061. The next prime is 78808087. The reversal of 78808073 is 37080887.

It can be written as a sum of positive squares in 4 ways, for example, as 42471289 + 36336784 = 6517^2 + 6028^2 .

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 78808073 - 2⁴ = 78808057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78808073.

It is not an unprimeable number, because it can be changed into a prime (78808003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 911 + ... + 12587.

It is an arithmetic number, because the mean of its divisors is an integer number (10457649).

Almost surely, 2^78808073 is an apocalyptic number.

It is an amenable number.

78808073 is a deficient number, since it is larger than the sum of its proper divisors (4853119).

78808073 is a wasteful number, since it uses less digits than its factorization.

78808073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12091.

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 78808073 is about 8877.3911145111. The cubic root of 78808073 is about 428.7362807024.

The spelling of 78808073 in words is "seventy-eight million, eight hundred eight thousand, seventy-three".