68306523 has 8 divisors (see below), whose sum is σ = 91115088. Its totient is φ = 45517824.

The previous prime is 68306471. The next prime is 68306543. The reversal of 68306523 is 32560386.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68306523 - 2²⁰ = 67257947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68306543) 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 7 ways as a sum of consecutive naturals, for example, 7611 + ... + 13947.

It is an arithmetic number, because the mean of its divisors is an integer number (11389386).

Almost surely, 2^68306523 is an apocalyptic number.

68306523 is a deficient number, since it is larger than the sum of its proper divisors (22808565).

68306523 is a wasteful number, since it uses less digits than its factorization.

68306523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9933.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 68306523 is about 8264.7760405228. The cubic root of 68306523 is about 408.7778856678. Note that the first 3 decimals are identical.

The spelling of 68306523 in words is "sixty-eight million, three hundred six thousand, five hundred twenty-three".