144143999 has 4 divisors (see below), whose sum is σ = 144572064. Its totient is φ = 143715936.

The previous prime is 144143983. The next prime is 144144019. The reversal of 144143999 is 999341441.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 144143999 - 2⁴ = 144143983 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 (144143939) 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, 213527 + ... + 214200.

It is an arithmetic number, because the mean of its divisors is an integer number (36143016).

Almost surely, 2^144143999 is an apocalyptic number.

144143999 is a deficient number, since it is larger than the sum of its proper divisors (428065).

144143999 is an equidigital number, since it uses as much as digits as its factorization.

144143999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428064.

The product of its digits is 139968, while the sum is 44.

The square root of 144143999 is about 12005.9984591037. The cubic root of 144143999 is about 524.3229355159.

The spelling of 144143999 in words is "one hundred forty-four million, one hundred forty-three thousand, nine hundred ninety-nine".