72418187 has 2 divisors, whose sum is σ = 72418188. Its totient is φ = 72418186.

The previous prime is 72418141. The next prime is 72418219. The reversal of 72418187 is 78181427.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72418187 - 2²⁰ = 71369611 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72418187.

It is a weakly prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36209093 + 36209094.

It is an arithmetic number, because the mean of its divisors is an integer number (36209094).

Almost surely, 2^72418187 is an apocalyptic number.

72418187 is a deficient number, since it is larger than the sum of its proper divisors (1).

72418187 is an equidigital number, since it uses as much as digits as its factorization.

72418187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25088, while the sum is 38.

The square root of 72418187 is about 8509.8876020779. The cubic root of 72418187 is about 416.8206399121.

The spelling of 72418187 in words is "seventy-two million, four hundred eighteen thousand, one hundred eighty-seven".