72147871 has 8 divisors (see below), whose sum is σ = 73366560. Its totient is φ = 70935552.

The previous prime is 72147869. The next prime is 72147913. The reversal of 72147871 is 17874127.

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 72147871 - 2¹ = 72147869 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72147871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72147671) 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, 24831 + ... + 27583.

It is an arithmetic number, because the mean of its divisors is an integer number (9170820).

Almost surely, 2^72147871 is an apocalyptic number.

72147871 is a deficient number, since it is larger than the sum of its proper divisors (1218689).

72147871 is a wasteful number, since it uses less digits than its factorization.

72147871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3185.

The product of its digits is 21952, while the sum is 37.

The square root of 72147871 is about 8493.9902872560. The cubic root of 72147871 is about 416.3013699313.

The spelling of 72147871 in words is "seventy-two million, one hundred forty-seven thousand, eight hundred seventy-one".