72471791 has 8 divisors (see below), whose sum is σ = 84587520. Its totient is φ = 60796728.

The previous prime is 72471779. The next prime is 72471797. The reversal of 72471791 is 19717427.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72471791 - 2¹⁴ = 72455407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72471797) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109811 + ... + 110468.

It is an arithmetic number, because the mean of its divisors is an integer number (10573440).

Almost surely, 2^72471791 is an apocalyptic number.

72471791 is a deficient number, since it is larger than the sum of its proper divisors (12115729).

72471791 is a wasteful number, since it uses less digits than its factorization.

72471791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220333.

The product of its digits is 24696, while the sum is 38.

The square root of 72471791 is about 8513.0365322839. The cubic root of 72471791 is about 416.9234582047.

The spelling of 72471791 in words is "seventy-two million, four hundred seventy-one thousand, seven hundred ninety-one".