72847181 has 8 divisors (see below), whose sum is σ = 79562304. Its totient is φ = 66147520.

The previous prime is 72847169. The next prime is 72847183. The reversal of 72847181 is 18174827.

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 72847181 - 2¹⁰ = 72846157 is a prime.

It is a super-2 number, since 2×72847181² = 10613423559293522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72847183) 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, 7445 + ... + 14181.

It is an arithmetic number, because the mean of its divisors is an integer number (9945288).

Almost surely, 2^72847181 is an apocalyptic number.

It is an amenable number.

72847181 is a deficient number, since it is larger than the sum of its proper divisors (6715123).

72847181 is a wasteful number, since it uses less digits than its factorization.

72847181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7731.

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

The square root of 72847181 is about 8535.0560045028. The cubic root of 72847181 is about 417.6420800808.

The spelling of 72847181 in words is "seventy-two million, eight hundred forty-seven thousand, one hundred eighty-one".