78546073 has 4 divisors (see below), whose sum is σ = 79119540. Its totient is φ = 77972608.

The previous prime is 78546047. The next prime is 78546077. The reversal of 78546073 is 37064587.

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 31719424 + 46826649 = 5632^2 + 6843^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78546073 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78546077) 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, 286528 + ... + 286801.

It is an arithmetic number, because the mean of its divisors is an integer number (19779885).

Almost surely, 2^78546073 is an apocalyptic number.

It is an amenable number.

78546073 is a deficient number, since it is larger than the sum of its proper divisors (573467).

78546073 is a wasteful number, since it uses less digits than its factorization.

78546073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573466.

The product of its (nonzero) digits is 141120, while the sum is 40.

The square root of 78546073 is about 8862.6222417522. The cubic root of 78546073 is about 428.2606373152.

The spelling of 78546073 in words is "seventy-eight million, five hundred forty-six thousand, seventy-three".