72134173 has 2 divisors, whose sum is σ = 72134174. Its totient is φ = 72134172.

The previous prime is 72134149. The next prime is 72134191. The reversal of 72134173 is 37143127.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36457444 + 35676729 = 6038^2 + 5973^2 .

It is a cyclic number.

It is not a de Polignac number, because 72134173 - 2¹³ = 72125981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72134123) 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 as a sum of consecutive naturals, namely, 36067086 + 36067087.

It is an arithmetic number, because the mean of its divisors is an integer number (36067087).

Almost surely, 2^72134173 is an apocalyptic number.

It is an amenable number.

72134173 is a deficient number, since it is larger than the sum of its proper divisors (1).

72134173 is an equidigital number, since it uses as much as digits as its factorization.

72134173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3528, while the sum is 28.

The square root of 72134173 is about 8493.1839141749. The cubic root of 72134173 is about 416.2750219277.

The spelling of 72134173 in words is "seventy-two million, one hundred thirty-four thousand, one hundred seventy-three".