72518633 has 4 divisors (see below), whose sum is σ = 79111248. Its totient is φ = 65926020.

The previous prime is 72518623. The next prime is 72518639. The reversal of 72518633 is 33681527.

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 a de Polignac number, because none of the positive numbers 2^k-72518633 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 72518593 and 72518602.

It is not an unprimeable number, because it can be changed into a prime (72518639) 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, 3296291 + ... + 3296312.

It is an arithmetic number, because the mean of its divisors is an integer number (19777812).

Almost surely, 2^72518633 is an apocalyptic number.

It is an amenable number.

72518633 is a deficient number, since it is larger than the sum of its proper divisors (6592615).

72518633 is a wasteful number, since it uses less digits than its factorization.

72518633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6592614.

The product of its digits is 30240, while the sum is 35.

The square root of 72518633 is about 8515.7872801051. The cubic root of 72518633 is about 417.0132647453.

The spelling of 72518633 in words is "seventy-two million, five hundred eighteen thousand, six hundred thirty-three".