72044517 has 4 divisors (see below), whose sum is σ = 96059360. Its totient is φ = 48029676.

The previous prime is 72044507. The next prime is 72044551. The reversal of 72044517 is 71544027.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71544027 = 3 ⋅23848009.

It is not a de Polignac number, because 72044517 - 2⁴ = 72044501 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 (72044507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12007417 + ... + 12007422.

It is an arithmetic number, because the mean of its divisors is an integer number (24014840).

Almost surely, 2^72044517 is an apocalyptic number.

It is an amenable number.

72044517 is a deficient number, since it is larger than the sum of its proper divisors (24014843).

72044517 is a wasteful number, since it uses less digits than its factorization.

72044517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24014842.

The product of its (nonzero) digits is 7840, while the sum is 30.

The square root of 72044517 is about 8487.9041582713. The cubic root of 72044517 is about 416.1024868453.

The spelling of 72044517 in words is "seventy-two million, forty-four thousand, five hundred seventeen".