6899971 has 4 divisors (see below), whose sum is σ = 7430752. Its totient is φ = 6369192.

The previous prime is 6899969. The next prime is 6899989. The reversal of 6899971 is 1799986.

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 6899971 - 2¹ = 6899969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6899951) 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, 265371 + ... + 265396.

It is an arithmetic number, because the mean of its divisors is an integer number (1857688).

Almost surely, 2^6899971 is an apocalyptic number.

6899971 is a deficient number, since it is larger than the sum of its proper divisors (530781).

6899971 is a wasteful number, since it uses less digits than its factorization.

6899971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530780.

The product of its digits is 244944, while the sum is 49.

The square root of 6899971 is about 2626.7795872513. The cubic root of 6899971 is about 190.3775594831.

The spelling of 6899971 in words is "six million, eight hundred ninety-nine thousand, nine hundred seventy-one".