6867989 has 2 divisors, whose sum is σ = 6867990. Its totient is φ = 6867988.

The previous prime is 6867967. The next prime is 6867997. The reversal of 6867989 is 9897686.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4765489 + 2102500 = 2183^2 + 1450^2 .

It is a cyclic number.

It is not a de Polignac number, because 6867989 - 2⁸ = 6867733 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6867989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6867389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3433994 + 3433995.

It is an arithmetic number, because the mean of its divisors is an integer number (3433995).

Almost surely, 2^6867989 is an apocalyptic number.

It is an amenable number.

6867989 is a deficient number, since it is larger than the sum of its proper divisors (1).

6867989 is an equidigital number, since it uses as much as digits as its factorization.

6867989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 53.

The square root of 6867989 is about 2620.6848341607. The cubic root of 6867989 is about 190.0829646910.

The spelling of 6867989 in words is "six million, eight hundred sixty-seven thousand, nine hundred eighty-nine".