72652517 has 4 divisors (see below), whose sum is σ = 83031456. Its totient is φ = 62273580.

The previous prime is 72652501. The next prime is 72652519. The reversal of 72652517 is 71525627.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 72652517 - 2⁴ = 72652501 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 (72652519) 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, 5189459 + ... + 5189472.

It is an arithmetic number, because the mean of its divisors is an integer number (20757864).

Almost surely, 2^72652517 is an apocalyptic number.

It is an amenable number.

72652517 is a deficient number, since it is larger than the sum of its proper divisors (10378939).

72652517 is a wasteful number, since it uses less digits than its factorization.

72652517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10378938.

The product of its digits is 29400, while the sum is 35.

The square root of 72652517 is about 8523.6445843313. The cubic root of 72652517 is about 417.2697371311.

The spelling of 72652517 in words is "seventy-two million, six hundred fifty-two thousand, five hundred seventeen".