6989869 has 2 divisors, whose sum is σ = 6989870. Its totient is φ = 6989868.

The previous prime is 6989833. The next prime is 6989921. The reversal of 6989869 is 9689896.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6953769 + 36100 = 2637^2 + 190^2 .

It is a cyclic number.

It is not a de Polignac number, because 6989869 - 2⁹ = 6989357 is a prime.

It is a super-2 number, since 2×6989869² = 97716537274322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6989809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3494934 + 3494935.

It is an arithmetic number, because the mean of its divisors is an integer number (3494935).

Almost surely, 2^6989869 is an apocalyptic number.

It is an amenable number.

6989869 is a deficient number, since it is larger than the sum of its proper divisors (1).

6989869 is an equidigital number, since it uses as much as digits as its factorization.

6989869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1679616, while the sum is 55.

The square root of 6989869 is about 2643.8360387891. The cubic root of 6989869 is about 191.2007884546.

The spelling of 6989869 in words is "six million, nine hundred eighty-nine thousand, eight hundred sixty-nine".