72524639 has 4 divisors (see below), whose sum is σ = 79117800. Its totient is φ = 65931480.

The previous prime is 72524623. The next prime is 72524659. The reversal of 72524639 is 93642527.

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 72524639 - 2⁴ = 72524623 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 (72524659) 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, 3296564 + ... + 3296585.

It is an arithmetic number, because the mean of its divisors is an integer number (19779450).

Almost surely, 2^72524639 is an apocalyptic number.

72524639 is a deficient number, since it is larger than the sum of its proper divisors (6593161).

72524639 is a wasteful number, since it uses less digits than its factorization.

72524639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6593160.

The product of its digits is 90720, while the sum is 38.

The square root of 72524639 is about 8516.1399119554. The cubic root of 72524639 is about 417.0247767867.

The spelling of 72524639 in words is "seventy-two million, five hundred twenty-four thousand, six hundred thirty-nine".