143000491 has 4 divisors (see below), whose sum is σ = 143028000. Its totient is φ = 142972984.

The previous prime is 143000401. The next prime is 143000513. The reversal of 143000491 is 194000341.

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

It is a cyclic number.

It is not a de Polignac number, because 143000491 - 2⁹ = 142999979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (143000401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3316 + ... + 17233.

It is an arithmetic number, because the mean of its divisors is an integer number (35757000).

Almost surely, 2^143000491 is an apocalyptic number.

143000491 is a deficient number, since it is larger than the sum of its proper divisors (27509).

143000491 is an equidigital number, since it uses as much as digits as its factorization.

143000491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27508.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 143000491 is about 11958.2812728251. The cubic root of 143000491 is about 522.9327516823.

The spelling of 143000491 in words is "one hundred forty-three million, four hundred ninety-one", and thus it is an aban number.