142839389 has 16 divisors (see below), whose sum is σ = 188562816. Its totient is φ = 104755200.

The previous prime is 142839379. The next prime is 142839401. The reversal of 142839389 is 983938241.

It is a happy number.

It is not a de Polignac number, because 142839389 - 2⁴ = 142839373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142839349) 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 in 15 ways as a sum of consecutive naturals, for example, 53252 + ... + 55869.

It is an arithmetic number, because the mean of its divisors is an integer number (11785176).

Almost surely, 2^142839389 is an apocalyptic number.

It is an amenable number.

142839389 is a deficient number, since it is larger than the sum of its proper divisors (45723427).

142839389 is a wasteful number, since it uses less digits than its factorization.

142839389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109156.

The product of its digits is 373248, while the sum is 47.

The square root of 142839389 is about 11951.5433731380. The cubic root of 142839389 is about 522.7363020806.

The spelling of 142839389 in words is "one hundred forty-two million, eight hundred thirty-nine thousand, three hundred eighty-nine".