72193523 has 4 divisors (see below), whose sum is σ = 72210600. Its totient is φ = 72176448.

The previous prime is 72193493. The next prime is 72193529. The reversal of 72193523 is 32539127.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 72193523 - 2¹⁰ = 72192499 is a prime.

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 72193523.

It is not an unprimeable number, because it can be changed into a prime (72193529) 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, 3011 + ... + 12387.

It is an arithmetic number, because the mean of its divisors is an integer number (18052650).

Almost surely, 2^72193523 is an apocalyptic number.

72193523 is a deficient number, since it is larger than the sum of its proper divisors (17077).

72193523 is an equidigital number, since it uses as much as digits as its factorization.

72193523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17076.

The product of its digits is 11340, while the sum is 32.

The square root of 72193523 is about 8496.6771740487. The cubic root of 72193523 is about 416.3891571511.

The spelling of 72193523 in words is "seventy-two million, one hundred ninety-three thousand, five hundred twenty-three".