6869641 has 3 divisors (see below), whose sum is σ = 6872263. Its totient is φ = 6867020.

The previous prime is 6869633. The next prime is 6869647. The reversal of 6869641 is 1469686.

The square root of 6869641 is 2621.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 5659641 + 1210000 = 2379^2 + 1100^2 .

It is not a de Polignac number, because 6869641 - 2³ = 6869633 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6869594 and 6869603.

It is not an unprimeable number, because it can be changed into a prime (6869647) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1311 + ... + 3931.

Almost surely, 2^6869641 is an apocalyptic number.

6869641 is the 2621-st square number.

6869641 is the 1311-st centered octagonal number.

It is an amenable number.

6869641 is a deficient number, since it is larger than the sum of its proper divisors (2622).

6869641 is an frugal number, since it uses more digits than its factorization.

6869641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5242 (or 2621 counting only the distinct ones).

The product of its digits is 62208, while the sum is 40.

The cubic root of 6869641 is about 190.0982040808.

The spelling of 6869641 in words is "six million, eight hundred sixty-nine thousand, six hundred forty-one".