78868073 has 4 divisors (see below), whose sum is σ = 80204880. Its totient is φ = 77531268.

The previous prime is 78868043. The next prime is 78868079. The reversal of 78868073 is 37086887.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37086887 = 4759 ⋅7793.

It is a cyclic number.

It is not a de Polignac number, because 78868073 - 2¹² = 78863977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78868079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 668315 + ... + 668432.

It is an arithmetic number, because the mean of its divisors is an integer number (20051220).

Almost surely, 2^78868073 is an apocalyptic number.

It is an amenable number.

78868073 is a deficient number, since it is larger than the sum of its proper divisors (1336807).

78868073 is a wasteful number, since it uses less digits than its factorization.

78868073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1336806.

The product of its (nonzero) digits is 451584, while the sum is 47.

The square root of 78868073 is about 8880.7698427558. The cubic root of 78868073 is about 428.8450582692.

The spelling of 78868073 in words is "seventy-eight million, eight hundred sixty-eight thousand, seventy-three".