142668679 has 2 divisors, whose sum is σ = 142668680. Its totient is φ = 142668678.

The previous prime is 142668677. The next prime is 142668689. The reversal of 142668679 is 976866241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 142668679 - 2¹ = 142668677 is a prime.

Together with 142668677, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142668671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71334339 + 71334340.

It is an arithmetic number, because the mean of its divisors is an integer number (71334340).

Almost surely, 2^142668679 is an apocalyptic number.

142668679 is a deficient number, since it is larger than the sum of its proper divisors (1).

142668679 is an equidigital number, since it uses as much as digits as its factorization.

142668679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 49.

The square root of 142668679 is about 11944.3994826027. The cubic root of 142668679 is about 522.5279751205.

The spelling of 142668679 in words is "one hundred forty-two million, six hundred sixty-eight thousand, six hundred seventy-nine".