6990571 has 4 divisors (see below), whose sum is σ = 7989232. Its totient is φ = 5991912.

The previous prime is 6990563. The next prime is 6990611. The reversal of 6990571 is 1750996.

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 6990571 - 2³ = 6990563 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6990571.

It is not an unprimeable number, because it can be changed into a prime (6990371) 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, 499320 + ... + 499333.

It is an arithmetic number, because the mean of its divisors is an integer number (1997308).

Almost surely, 2^6990571 is an apocalyptic number.

6990571 is a deficient number, since it is larger than the sum of its proper divisors (998661).

6990571 is an equidigital number, since it uses as much as digits as its factorization.

6990571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998660.

The product of its (nonzero) digits is 17010, while the sum is 37.

The square root of 6990571 is about 2643.9687970927. The cubic root of 6990571 is about 191.2071890734.

The spelling of 6990571 in words is "six million, nine hundred ninety thousand, five hundred seventy-one".