142817839 has 2 divisors, whose sum is σ = 142817840. Its totient is φ = 142817838.

The previous prime is 142817827. The next prime is 142817861. The reversal of 142817839 is 938718241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 142817839 - 2¹³ = 142809647 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 142817795 and 142817804.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142817809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71408919 + 71408920.

It is an arithmetic number, because the mean of its divisors is an integer number (71408920).

Almost surely, 2^142817839 is an apocalyptic number.

142817839 is a deficient number, since it is larger than the sum of its proper divisors (1).

142817839 is an equidigital number, since it uses as much as digits as its factorization.

142817839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 43.

The square root of 142817839 is about 11950.6417819295. The cubic root of 142817839 is about 522.7100125677.

The spelling of 142817839 in words is "one hundred forty-two million, eight hundred seventeen thousand, eight hundred thirty-nine".