68142923 has 2 divisors, whose sum is σ = 68142924. Its totient is φ = 68142922.

The previous prime is 68142913. The next prime is 68142959. The reversal of 68142923 is 32924186.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68142923 - 2⁸ = 68142667 is a prime.

It is not a weakly prime, because it can be changed into another prime (68142913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34071461 + 34071462.

It is an arithmetic number, because the mean of its divisors is an integer number (34071462).

Almost surely, 2^68142923 is an apocalyptic number.

68142923 is a deficient number, since it is larger than the sum of its proper divisors (1).

68142923 is an equidigital number, since it uses as much as digits as its factorization.

68142923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 35.

The square root of 68142923 is about 8254.8726822405. The cubic root of 68142923 is about 408.4512720365.

The spelling of 68142923 in words is "sixty-eight million, one hundred forty-two thousand, nine hundred twenty-three".