78073 has 4 divisors (see below), whose sum is σ = 78948. Its totient is φ = 77200.

The previous prime is 78059. The next prime is 78079. The reversal of 78073 is 37087.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 41209 + 36864 = 203^2 + 192^2 .

It is a cyclic number.

It is not a de Polignac number, because 78073 - 2⁵ = 78041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78079) 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, 286 + ... + 487.

It is an arithmetic number, because the mean of its divisors is an integer number (19737).

2⁷⁸⁰⁷³ is an apocalyptic number.

It is an amenable number.

78073 is a deficient number, since it is larger than the sum of its proper divisors (875).

78073 is a wasteful number, since it uses less digits than its factorization.

78073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 78073 is about 279.4154612759. The cubic root of 78073 is about 42.7399118952.

The spelling of 78073 in words is "seventy-eight thousand, seventy-three".