72109187 has 2 divisors, whose sum is σ = 72109188. Its totient is φ = 72109186.

The previous prime is 72109157. The next prime is 72109217. The reversal of 72109187 is 78190127.

It is a balanced prime because it is at equal distance from previous prime (72109157) and next prime (72109217).

It is an emirp because it is prime and its reverse (78190127) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72109187 - 2⁸ = 72108931 is a prime.

It is not a weakly prime, because it can be changed into another prime (72109127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36054593 + 36054594.

It is an arithmetic number, because the mean of its divisors is an integer number (36054594).

Almost surely, 2^72109187 is an apocalyptic number.

72109187 is a deficient number, since it is larger than the sum of its proper divisors (1).

72109187 is an equidigital number, since it uses as much as digits as its factorization.

72109187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 35.

The square root of 72109187 is about 8491.7128425307. The cubic root of 72109187 is about 416.2269529454.

The spelling of 72109187 in words is "seventy-two million, one hundred nine thousand, one hundred eighty-seven".