72195173 has 8 divisors (see below), whose sum is σ = 73656960. Its totient is φ = 70741440.

The previous prime is 72195163. The next prime is 72195191. The reversal of 72195173 is 37159127.

It is a happy number.

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 72195173 - 2⁴ = 72195157 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 (72195163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18068 + ... + 21698.

It is an arithmetic number, because the mean of its divisors is an integer number (9207120).

Almost surely, 2^72195173 is an apocalyptic number.

It is an amenable number.

72195173 is a deficient number, since it is larger than the sum of its proper divisors (1461787).

72195173 is a wasteful number, since it uses less digits than its factorization.

72195173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4027.

The product of its digits is 13230, while the sum is 35.

The square root of 72195173 is about 8496.7742702746. The cubic root of 72195173 is about 416.3923293511.

The spelling of 72195173 in words is "seventy-two million, one hundred ninety-five thousand, one hundred seventy-three".