142873189 has 4 divisors (see below), whose sum is σ = 143086156. Its totient is φ = 142660224.

The previous prime is 142873187. The next prime is 142873193. The reversal of 142873189 is 981378241.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 69856164 + 73017025 = 8358^2 + 8545^2 .

It is a cyclic number.

It is not a de Polignac number, because 142873189 - 2¹ = 142873187 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 (142873183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105474 + ... + 106819.

It is an arithmetic number, because the mean of its divisors is an integer number (35771539).

Almost surely, 2^142873189 is an apocalyptic number.

It is an amenable number.

142873189 is a deficient number, since it is larger than the sum of its proper divisors (212967).

142873189 is an equidigital number, since it uses as much as digits as its factorization.

142873189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212966.

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

The square root of 142873189 is about 11952.9573328110. The cubic root of 142873189 is about 522.7775304227. Note that the first 3 decimals are identical.

The spelling of 142873189 in words is "one hundred forty-two million, eight hundred seventy-three thousand, one hundred eighty-nine".