142878839 has 2 divisors, whose sum is σ = 142878840. Its totient is φ = 142878838.

The previous prime is 142878811. The next prime is 142878877. The reversal of 142878839 is 938878241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 142878839 - 2⁸ = 142878583 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142878889) 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, 71439419 + 71439420.

It is an arithmetic number, because the mean of its divisors is an integer number (71439420).

Almost surely, 2^142878839 is an apocalyptic number.

142878839 is a deficient number, since it is larger than the sum of its proper divisors (1).

142878839 is an equidigital number, since it uses as much as digits as its factorization.

142878839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 774144, while the sum is 50.

The square root of 142878839 is about 11953.1936736589. The cubic root of 142878839 is about 522.7844215082.

The spelling of 142878839 in words is "one hundred forty-two million, eight hundred seventy-eight thousand, eight hundred thirty-nine".