72173 has 2 divisors, whose sum is σ = 72174. Its totient is φ = 72172.

The previous prime is 72169. The next prime is 72211. The reversal of 72173 is 37127.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47524 + 24649 = 218^2 + 157^2 .

It is a cyclic number.

It is not a de Polignac number, because 72173 - 2² = 72169 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36086 + 36087.

It is an arithmetic number, because the mean of its divisors is an integer number (36087).

2⁷²¹⁷³ is an apocalyptic number.

It is an amenable number.

72173 is a deficient number, since it is larger than the sum of its proper divisors (1).

72173 is an equidigital number, since it uses as much as digits as its factorization.

72173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 294, while the sum is 20.

The square root of 72173 is about 268.6503303553. The cubic root of 72173 is about 41.6349696711.

The spelling of 72173 in words is "seventy-two thousand, one hundred seventy-three", and thus it is an iban number.