72563189 has 2 divisors, whose sum is σ = 72563190. Its totient is φ = 72563188.

The previous prime is 72563171. The next prime is 72563203. The reversal of 72563189 is 98136527.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70980625 + 1582564 = 8425^2 + 1258^2 .

It is an emirp because it is prime and its reverse (98136527) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72563189 - 2⁸ = 72562933 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72563119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36281594 + 36281595.

It is an arithmetic number, because the mean of its divisors is an integer number (36281595).

Almost surely, 2^72563189 is an apocalyptic number.

It is an amenable number.

72563189 is a deficient number, since it is larger than the sum of its proper divisors (1).

72563189 is an equidigital number, since it uses as much as digits as its factorization.

72563189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 41.

The square root of 72563189 is about 8518.4029606494. The cubic root of 72563189 is about 417.0986526345.

The spelling of 72563189 in words is "seventy-two million, five hundred sixty-three thousand, one hundred eighty-nine".