78543073 has 8 divisors (see below), whose sum is σ = 90089792. Its totient is φ = 67077936.

The previous prime is 78543061. The next prime is 78543079. The reversal of 78543073 is 37034587.

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 78543073 - 2⁵ = 78543041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78543079) 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, 18315 + ... + 22192.

It is an arithmetic number, because the mean of its divisors is an integer number (11261224).

Almost surely, 2^78543073 is an apocalyptic number.

It is an amenable number.

78543073 is a deficient number, since it is larger than the sum of its proper divisors (11546719).

78543073 is a wasteful number, since it uses less digits than its factorization.

78543073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40791.

The product of its (nonzero) digits is 70560, while the sum is 37.

The square root of 78543073 is about 8862.4529900023. The cubic root of 78543073 is about 428.2551848964.

The spelling of 78543073 in words is "seventy-eight million, five hundred forty-three thousand, seventy-three".