142859989 has 8 divisors (see below), whose sum is σ = 143881920. Its totient is φ = 141842016.

The previous prime is 142859957. The next prime is 142859999. The reversal of 142859989 is 989958241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 142859989 - 2⁵ = 142859957 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 (142859939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112842 + ... + 114100.

It is an arithmetic number, because the mean of its divisors is an integer number (17985240).

Almost surely, 2^142859989 is an apocalyptic number.

It is an amenable number.

142859989 is a deficient number, since it is larger than the sum of its proper divisors (1021931).

142859989 is a wasteful number, since it uses less digits than its factorization.

142859989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1979.

The product of its digits is 1866240, while the sum is 55.

The square root of 142859989 is about 11952.4051554488. The cubic root of 142859989 is about 522.7614301873.

The spelling of 142859989 in words is "one hundred forty-two million, eight hundred fifty-nine thousand, nine hundred eighty-nine".