6881869 has 2 divisors, whose sum is σ = 6881870. Its totient is φ = 6881868.

The previous prime is 6881851. The next prime is 6881873. The reversal of 6881869 is 9681886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3861225 + 3020644 = 1965^2 + 1738^2 .

It is a cyclic number.

It is not a de Polignac number, because 6881869 - 2¹⁷ = 6750797 is a prime.

It is a super-2 number, since 2×6881869² = 94720241866322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6881839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3440934 + 3440935.

It is an arithmetic number, because the mean of its divisors is an integer number (3440935).

Almost surely, 2^6881869 is an apocalyptic number.

It is an amenable number.

6881869 is a deficient number, since it is larger than the sum of its proper divisors (1).

6881869 is an equidigital number, since it uses as much as digits as its factorization.

6881869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 165888, while the sum is 46.

The square root of 6881869 is about 2623.3316603129. The cubic root of 6881869 is about 190.2109291845.

It can be divided in two parts, 6881 and 869, that added together give a triangular number (7750 = T₁₂₄).

The spelling of 6881869 in words is "six million, eight hundred eighty-one thousand, eight hundred sixty-nine".