142923791 has 2 divisors, whose sum is σ = 142923792. Its totient is φ = 142923790.

The previous prime is 142923769. The next prime is 142923821. The reversal of 142923791 is 197329241.

It is a weak prime.

It is an emirp because it is prime and its reverse (197329241) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142923791 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142923721) 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 as a sum of consecutive naturals, namely, 71461895 + 71461896.

It is an arithmetic number, because the mean of its divisors is an integer number (71461896).

Almost surely, 2^142923791 is an apocalyptic number.

142923791 is a deficient number, since it is larger than the sum of its proper divisors (1).

142923791 is an equidigital number, since it uses as much as digits as its factorization.

142923791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 38.

The square root of 142923791 is about 11955.0738600813. The cubic root of 142923791 is about 522.8392412455.

The spelling of 142923791 in words is "one hundred forty-two million, nine hundred twenty-three thousand, seven hundred ninety-one".