72004189 has 2 divisors, whose sum is σ = 72004190. Its totient is φ = 72004188.

The previous prime is 72004181. The next prime is 72004253. The reversal of 72004189 is 98140027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69056100 + 2948089 = 8310^2 + 1717^2 .

It is an emirp because it is prime and its reverse (98140027) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72004189 - 2³ = 72004181 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72004189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72004181) 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, 36002094 + 36002095.

It is an arithmetic number, because the mean of its divisors is an integer number (36002095).

Almost surely, 2^72004189 is an apocalyptic number.

It is an amenable number.

72004189 is a deficient number, since it is larger than the sum of its proper divisors (1).

72004189 is an equidigital number, since it uses as much as digits as its factorization.

72004189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 72004189 is about 8485.5282098406. The cubic root of 72004189 is about 416.0248324827.

The spelling of 72004189 in words is "seventy-two million, four thousand, one hundred eighty-nine".