68542123 has 4 divisors (see below), whose sum is σ = 73814608. Its totient is φ = 63269640.

The previous prime is 68542073. The next prime is 68542153. The reversal of 68542123 is 32124586.

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 68542123 - 2²⁵ = 34987691 is a prime.

It is a super-3 number, since 3×68542123³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68542153) 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, 2636223 + ... + 2636248.

It is an arithmetic number, because the mean of its divisors is an integer number (18453652).

Almost surely, 2^68542123 is an apocalyptic number.

68542123 is a deficient number, since it is larger than the sum of its proper divisors (5272485).

68542123 is a wasteful number, since it uses less digits than its factorization.

68542123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5272484.

The product of its digits is 11520, while the sum is 31.

The square root of 68542123 is about 8279.0170310249. The cubic root of 68542123 is about 409.2473262135.

The spelling of 68542123 in words is "sixty-eight million, five hundred forty-two thousand, one hundred twenty-three".