72336647 has 4 divisors (see below), whose sum is σ = 72359496. Its totient is φ = 72313800.

The previous prime is 72336637. The next prime is 72336689. The reversal of 72336647 is 74663327.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72336647 - 2⁴ = 72336631 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 72336647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72336637) 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 in 3 ways as a sum of consecutive naturals, for example, 5729 + ... + 13322.

It is an arithmetic number, because the mean of its divisors is an integer number (18089874).

Almost surely, 2^72336647 is an apocalyptic number.

72336647 is a deficient number, since it is larger than the sum of its proper divisors (22849).

72336647 is a wasteful number, since it uses less digits than its factorization.

72336647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22848.

The product of its digits is 127008, while the sum is 38.

The square root of 72336647 is about 8505.0953551386. The cubic root of 72336647 is about 416.6641400025.

The spelling of 72336647 in words is "seventy-two million, three hundred thirty-six thousand, six hundred forty-seven".