68123971 has 4 divisors (see below), whose sum is σ = 68726952. Its totient is φ = 67520992.

The previous prime is 68123969. The next prime is 68123983. The reversal of 68123971 is 17932186.

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 68123971 - 2¹ = 68123969 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 68123971.

It is not an unprimeable number, because it can be changed into a prime (68123071) 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, 301321 + ... + 301546.

It is an arithmetic number, because the mean of its divisors is an integer number (17181738).

Almost surely, 2^68123971 is an apocalyptic number.

68123971 is a deficient number, since it is larger than the sum of its proper divisors (602981).

68123971 is a wasteful number, since it uses less digits than its factorization.

68123971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602980.

The product of its digits is 18144, while the sum is 37.

The square root of 68123971 is about 8253.7246743516. The cubic root of 68123971 is about 408.4134021892.

The spelling of 68123971 in words is "sixty-eight million, one hundred twenty-three thousand, nine hundred seventy-one".