72651173 has 8 divisors (see below), whose sum is σ = 84724800. Its totient is φ = 62272140.

The previous prime is 72651169. The next prime is 72651199. The reversal of 72651173 is 37115627.

It is not a de Polignac number, because 72651173 - 2² = 72651169 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72651113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105563 + ... + 106248.

It is an arithmetic number, because the mean of its divisors is an integer number (10590600).

Almost surely, 2^72651173 is an apocalyptic number.

It is an amenable number.

72651173 is a deficient number, since it is larger than the sum of its proper divisors (12073627).

72651173 is an equidigital number, since it uses as much as digits as its factorization.

72651173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211832 (or 211818 counting only the distinct ones).

The product of its digits is 8820, while the sum is 32.

The square root of 72651173 is about 8523.5657444523. The cubic root of 72651173 is about 417.2671640889.

The spelling of 72651173 in words is "seventy-two million, six hundred fifty-one thousand, one hundred seventy-three".