143972999 has 4 divisors (see below), whose sum is σ = 144365664. Its totient is φ = 143580336.

The previous prime is 143972971. The next prime is 143973007. The reversal of 143972999 is 999279341.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143972999 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 143972999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143972909) 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 3 ways as a sum of consecutive naturals, for example, 195782 + ... + 196515.

It is an arithmetic number, because the mean of its divisors is an integer number (36091416).

Almost surely, 2^143972999 is an apocalyptic number.

143972999 is a deficient number, since it is larger than the sum of its proper divisors (392665).

143972999 is an equidigital number, since it uses as much as digits as its factorization.

143972999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392664.

The product of its digits is 1102248, while the sum is 53.

The square root of 143972999 is about 11998.8749055901. The cubic root of 143972999 is about 524.1155163132.

The spelling of 143972999 in words is "one hundred forty-three million, nine hundred seventy-two thousand, nine hundred ninety-nine".