68536723 has 4 divisors (see below), whose sum is σ = 68836240. Its totient is φ = 68237208.

The previous prime is 68536697. The next prime is 68536751. The reversal of 68536723 is 32763586.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68536723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68536823) 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, 149415 + ... + 149872.

It is an arithmetic number, because the mean of its divisors is an integer number (17209060).

Almost surely, 2^68536723 is an apocalyptic number.

68536723 is a deficient number, since it is larger than the sum of its proper divisors (299517).

68536723 is a wasteful number, since it uses less digits than its factorization.

68536723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299516.

The product of its digits is 181440, while the sum is 40.

The square root of 68536723 is about 8278.6908989284. The cubic root of 68536723 is about 409.2365785958.

The spelling of 68536723 in words is "sixty-eight million, five hundred thirty-six thousand, seven hundred twenty-three".