72271187 has 2 divisors, whose sum is σ = 72271188. Its totient is φ = 72271186.

The previous prime is 72271181. The next prime is 72271189. The reversal of 72271187 is 78117227.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72271187 - 2²⁰ = 71222611 is a prime.

Together with 72271189, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72271181) 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, 36135593 + 36135594.

It is an arithmetic number, because the mean of its divisors is an integer number (36135594).

Almost surely, 2^72271187 is an apocalyptic number.

72271187 is a deficient number, since it is larger than the sum of its proper divisors (1).

72271187 is an equidigital number, since it uses as much as digits as its factorization.

72271187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10976, while the sum is 35.

The square root of 72271187 is about 8501.2462027635. The cubic root of 72271187 is about 416.5384173469.

The spelling of 72271187 in words is "seventy-two million, two hundred seventy-one thousand, one hundred eighty-seven".