72369517 has 4 divisors (see below), whose sum is σ = 78948576. Its totient is φ = 65790460.

The previous prime is 72369503. The next prime is 72369547. The reversal of 72369517 is 71596327.

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: 71596327 = 11 ⋅6508757.

It is a cyclic number.

It is not a de Polignac number, because 72369517 - 2¹¹ = 72367469 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 72369517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72369547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3289513 + ... + 3289534.

It is an arithmetic number, because the mean of its divisors is an integer number (19737144).

Almost surely, 2^72369517 is an apocalyptic number.

It is an amenable number.

72369517 is a deficient number, since it is larger than the sum of its proper divisors (6579059).

72369517 is a wasteful number, since it uses less digits than its factorization.

72369517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6579058.

The product of its digits is 79380, while the sum is 40.

The square root of 72369517 is about 8507.0275067147. The cubic root of 72369517 is about 416.7272416110.

The spelling of 72369517 in words is "seventy-two million, three hundred sixty-nine thousand, five hundred seventeen".