78973 has 4 divisors (see below), whose sum is σ = 79648. Its totient is φ = 78300.

The previous prime is 78941. The next prime is 78977. The reversal of 78973 is 37987.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 78973 - 2⁵ = 78941 is a prime.

It is a Duffinian number.

78973 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78977) 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, 111 + ... + 412.

It is an arithmetic number, because the mean of its divisors is an integer number (19912).

2⁷⁸⁹⁷³ is an apocalyptic number.

It is an amenable number.

78973 is a deficient number, since it is larger than the sum of its proper divisors (675).

78973 is a wasteful number, since it uses less digits than its factorization.

78973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674.

The product of its digits is 10584, while the sum is 34.

The square root of 78973 is about 281.0213515020. The cubic root of 78973 is about 42.9035154140.

The spelling of 78973 in words is "seventy-eight thousand, nine hundred seventy-three".