143244991 has 4 divisors (see below), whose sum is σ = 143452984. Its totient is φ = 143037000.

The previous prime is 143244973. The next prime is 143245001. The reversal of 143244991 is 199442341.

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

It is not a de Polignac number, because 143244991 - 2⁷ = 143244863 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 143244991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143244901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102960 + ... + 104341.

It is an arithmetic number, because the mean of its divisors is an integer number (35863246).

Almost surely, 2^143244991 is an apocalyptic number.

143244991 is a deficient number, since it is larger than the sum of its proper divisors (207993).

143244991 is an equidigital number, since it uses as much as digits as its factorization.

143244991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207992.

The product of its digits is 31104, while the sum is 37.

The square root of 143244991 is about 11968.4999477796. The cubic root of 143244991 is about 523.2306160619.

The spelling of 143244991 in words is "one hundred forty-three million, two hundred forty-four thousand, nine hundred ninety-one".