3968869 has 2 divisors, whose sum is σ = 3968870. Its totient is φ = 3968868.

The previous prime is 3968863. The next prime is 3968873. The reversal of 3968869 is 9688693.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3496900 + 471969 = 1870^2 + 687^2 .

It is a cyclic number.

It is not a de Polignac number, because 3968869 - 2⁹ = 3968357 is a prime.

It is a super-2 number, since 2×3968869² = 31503842278322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3968863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1984434 + 1984435.

It is an arithmetic number, because the mean of its divisors is an integer number (1984435).

Almost surely, 2^3968869 is an apocalyptic number.

It is an amenable number.

3968869 is a deficient number, since it is larger than the sum of its proper divisors (1).

3968869 is an equidigital number, since it uses as much as digits as its factorization.

3968869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 559872, while the sum is 49.

The square root of 3968869 is about 1992.2020479861. The cubic root of 3968869 is about 158.3272206935.

The spelling of 3968869 in words is "three million, nine hundred sixty-eight thousand, eight hundred sixty-nine".