6389143 has 4 divisors (see below), whose sum is σ = 6407800. Its totient is φ = 6370488.

The previous prime is 6389137. The next prime is 6389167. The reversal of 6389143 is 3419836.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6389143 is a prime.

It is a super-2 number, since 2×6389143² = 81642296548898, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6389099 and 6389108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6389113) 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, 8805 + ... + 9502.

It is an arithmetic number, because the mean of its divisors is an integer number (1601950).

Almost surely, 2^6389143 is an apocalyptic number.

6389143 is a deficient number, since it is larger than the sum of its proper divisors (18657).

6389143 is a wasteful number, since it uses less digits than its factorization.

6389143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18656.

The product of its digits is 15552, while the sum is 34.

The square root of 6389143 is about 2527.6754142888. The cubic root of 6389143 is about 185.5585069842.

The spelling of 6389143 in words is "six million, three hundred eighty-nine thousand, one hundred forty-three".