6899143 has 4 divisors (see below), whose sum is σ = 7121728. Its totient is φ = 6676560.

The previous prime is 6899117. The next prime is 6899201. The reversal of 6899143 is 3419986.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3419986 = 2 ⋅1709993.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6899143 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6899096 and 6899105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6899443) 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, 111246 + ... + 111307.

It is an arithmetic number, because the mean of its divisors is an integer number (1780432).

Almost surely, 2^6899143 is an apocalyptic number.

6899143 is a deficient number, since it is larger than the sum of its proper divisors (222585).

6899143 is a wasteful number, since it uses less digits than its factorization.

6899143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222584.

The product of its digits is 46656, while the sum is 40.

The square root of 6899143 is about 2626.6219750851. The cubic root of 6899143 is about 190.3699440440.

The spelling of 6899143 in words is "six million, eight hundred ninety-nine thousand, one hundred forty-three".