6997885 has 4 divisors (see below), whose sum is σ = 8397468. Its totient is φ = 5598304.

The previous prime is 6997873. The next prime is 6997891. The reversal of 6997885 is 5887996.

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

It can be written as a sum of positive squares in 2 ways, for example, as 737881 + 6260004 = 859^2 + 2502^2 .

It is a cyclic number.

It is not a de Polignac number, because 6997885 - 2⁹ = 6997373 is a prime.

It is a Duffinian number.

6997885 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 699784 + ... + 699793.

It is an arithmetic number, because the mean of its divisors is an integer number (2099367).

Almost surely, 2^6997885 is an apocalyptic number.

It is an amenable number.

6997885 is a deficient number, since it is larger than the sum of its proper divisors (1399583).

6997885 is a wasteful number, since it uses less digits than its factorization.

6997885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1399582.

The product of its digits is 1088640, while the sum is 52.

The square root of 6997885 is about 2645.3515834384. The cubic root of 6997885 is about 191.2738503868.

The spelling of 6997885 in words is "six million, nine hundred ninety-seven thousand, eight hundred eighty-five".