143997 has 8 divisors (see below), whose sum is σ = 219456. Its totient is φ = 82272.

The previous prime is 143981. The next prime is 143999. The reversal of 143997 is 799341.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 143997 - 2⁴ = 143981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3408 + ... + 3449.

It is an arithmetic number, because the mean of its divisors is an integer number (27432).

2¹⁴³⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

143997 is a deficient number, since it is larger than the sum of its proper divisors (75459).

143997 is an equidigital number, since it uses as much as digits as its factorization.

143997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6867.

The product of its digits is 6804, while the sum is 33.

The square root of 143997 is about 379.4693663525. The cubic root of 143997 is about 52.4144638898.

The spelling of 143997 in words is "one hundred forty-three thousand, nine hundred ninety-seven".