67318973 has 4 divisors (see below), whose sum is σ = 67337820. Its totient is φ = 67300128.

The previous prime is 67318903. The next prime is 67319003. The reversal of 67318973 is 37981376.

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 3286969 + 64032004 = 1813^2 + 8002^2 .

It is a cyclic number.

It is not a de Polignac number, because 67318973 - 2¹⁴ = 67302589 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67318903) 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, 2240 + ... + 11817.

It is an arithmetic number, because the mean of its divisors is an integer number (16834455).

Almost surely, 2^67318973 is an apocalyptic number.

It is an amenable number.

67318973 is a deficient number, since it is larger than the sum of its proper divisors (18847).

67318973 is a wasteful number, since it uses less digits than its factorization.

67318973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18846.

The product of its digits is 190512, while the sum is 44.

The square root of 67318973 is about 8204.8140137361. The cubic root of 67318973 is about 406.7983292963.

The spelling of 67318973 in words is "sixty-seven million, three hundred eighteen thousand, nine hundred seventy-three".