72087271 has 2 divisors, whose sum is σ = 72087272. Its totient is φ = 72087270.

The previous prime is 72087269. The next prime is 72087277. The reversal of 72087271 is 17278027.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72087271 - 2¹ = 72087269 is a prime.

Together with 72087269, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72087277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36043635 + 36043636.

It is an arithmetic number, because the mean of its divisors is an integer number (36043636).

Almost surely, 2^72087271 is an apocalyptic number.

72087271 is a deficient number, since it is larger than the sum of its proper divisors (1).

72087271 is an equidigital number, since it uses as much as digits as its factorization.

72087271 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10976, while the sum is 34.

The square root of 72087271 is about 8490.4223098736. The cubic root of 72087271 is about 416.1847809995.

The spelling of 72087271 in words is "seventy-two million, eighty-seven thousand, two hundred seventy-one".