6990143 has 8 divisors (see below), whose sum is σ = 7151760. Its totient is φ = 6830080.

The previous prime is 6990107. The next prime is 6990161. The reversal of 6990143 is 3410996.

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

It is a cyclic number.

It is not a de Polignac number, because 6990143 - 2¹⁰ = 6989119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6999143) 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, 14933 + ... + 15393.

It is an arithmetic number, because the mean of its divisors is an integer number (893970).

Almost surely, 2^6990143 is an apocalyptic number.

6990143 is a deficient number, since it is larger than the sum of its proper divisors (161617).

6990143 is a wasteful number, since it uses less digits than its factorization.

6990143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 6990143 is about 2643.8878569259. The cubic root of 6990143 is about 191.2032867528.

The spelling of 6990143 in words is "six million, nine hundred ninety thousand, one hundred forty-three".