68544523 has 4 divisors (see below), whose sum is σ = 68721120. Its totient is φ = 68367928.

The previous prime is 68544449. The next prime is 68544547. The reversal of 68544523 is 32544586.

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 68544523 - 2⁹ = 68544011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68544563) 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, 87715 + ... + 88492.

It is an arithmetic number, because the mean of its divisors is an integer number (17180280).

Almost surely, 2^68544523 is an apocalyptic number.

68544523 is a deficient number, since it is larger than the sum of its proper divisors (176597).

68544523 is a wasteful number, since it uses less digits than its factorization.

68544523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176596.

The product of its digits is 115200, while the sum is 37.

The square root of 68544523 is about 8279.1619744996. The cubic root of 68544523 is about 409.2521027513.

Subtracting from 68544523 its sum of digits (37), we obtain a triangular number (68544486 = T₁₁₇₀₈).

The spelling of 68544523 in words is "sixty-eight million, five hundred forty-four thousand, five hundred twenty-three".