73172971 has 8 divisors (see below), whose sum is σ = 78816320. Its totient is φ = 67708872.

The previous prime is 73172969. The next prime is 73172993. The reversal of 73172971 is 17927137.

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 73172971 - 2¹ = 73172969 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 73172971.

It is not an unprimeable number, because it can be changed into a prime (73172371) 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, 43965 + ... + 45598.

It is an arithmetic number, because the mean of its divisors is an integer number (9852040).

Almost surely, 2^73172971 is an apocalyptic number.

73172971 is a deficient number, since it is larger than the sum of its proper divisors (5643349).

73172971 is a wasteful number, since it uses less digits than its factorization.

73172971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89625.

The product of its digits is 18522, while the sum is 37.

The square root of 73172971 is about 8554.1201183991. The cubic root of 73172971 is about 418.2637526357.

The spelling of 73172971 in words is "seventy-three million, one hundred seventy-two thousand, nine hundred seventy-one".