143999427 has 16 divisors (see below), whose sum is σ = 225566208. Its totient is φ = 80558880.

The previous prime is 143999417. The next prime is 143999441. The reversal of 143999427 is 724999341.

It is a happy number.

It is not a de Polignac number, because 143999427 - 2⁶ = 143999363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (143999417) 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 in 15 ways as a sum of consecutive naturals, for example, 167403 + ... + 168260.

It is an arithmetic number, because the mean of its divisors is an integer number (14097888).

Almost surely, 2^143999427 is an apocalyptic number.

143999427 is a deficient number, since it is larger than the sum of its proper divisors (81566781).

143999427 is a wasteful number, since it uses less digits than its factorization.

143999427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335690.

The product of its digits is 489888, while the sum is 48.

The square root of 143999427 is about 11999.9761249762. The cubic root of 143999427 is about 524.1475836164.

The spelling of 143999427 in words is "one hundred forty-three million, nine hundred ninety-nine thousand, four hundred twenty-seven".