143664249 has 4 divisors (see below), whose sum is σ = 191552336. Its totient is φ = 95776164.

The previous prime is 143664167. The next prime is 143664253. The reversal of 143664249 is 942466341.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 143664249 - 2²⁰ = 142615673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (143664349) 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, 23944039 + ... + 23944044.

It is an arithmetic number, because the mean of its divisors is an integer number (47888084).

Almost surely, 2^143664249 is an apocalyptic number.

It is an amenable number.

143664249 is a deficient number, since it is larger than the sum of its proper divisors (47888087).

143664249 is an equidigital number, since it uses as much as digits as its factorization.

143664249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47888086.

The product of its digits is 124416, while the sum is 39.

The square root of 143664249 is about 11986.0022109125. The cubic root of 143664249 is about 523.7405930532.

The spelling of 143664249 in words is "one hundred forty-three million, six hundred sixty-four thousand, two hundred forty-nine".