143911 has 4 divisors (see below), whose sum is σ = 150192. Its totient is φ = 137632.

The previous prime is 143909. The next prime is 143947. The reversal of 143911 is 119341.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 119341 = 131 ⋅911.

It is not a de Polignac number, because 143911 - 2¹ = 143909 is a prime.

It is a fibodiv number, since the Fibonacci-like sequence with seeds 143 and 911 contains 143911 itself.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143971) 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, 3106 + ... + 3151.

It is an arithmetic number, because the mean of its divisors is an integer number (37548).

2¹⁴³⁹¹¹ is an apocalyptic number.

143911 is a deficient number, since it is larger than the sum of its proper divisors (6281).

143911 is an equidigital number, since it uses as much as digits as its factorization.

143911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6280.

The product of its digits is 108, while the sum is 19.

The square root of 143911 is about 379.3560332985. The cubic root of 143911 is about 52.4040272335.

The spelling of 143911 in words is "one hundred forty-three thousand, nine hundred eleven".