72543187 has 2 divisors, whose sum is σ = 72543188. Its totient is φ = 72543186.

The previous prime is 72543157. The next prime is 72543203. The reversal of 72543187 is 78134527.

It is a strong prime.

It is an emirp because it is prime and its reverse (78134527) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72543187 is a prime.

It is not a weakly prime, because it can be changed into another prime (72543157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36271593 + 36271594.

It is an arithmetic number, because the mean of its divisors is an integer number (36271594).

Almost surely, 2^72543187 is an apocalyptic number.

72543187 is a deficient number, since it is larger than the sum of its proper divisors (1).

72543187 is an equidigital number, since it uses as much as digits as its factorization.

72543187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47040, while the sum is 37.

The square root of 72543187 is about 8517.2288333706. The cubic root of 72543187 is about 417.0603247805.

The spelling of 72543187 in words is "seventy-two million, five hundred forty-three thousand, one hundred eighty-seven".