3866969 has 2 divisors, whose sum is σ = 3866970. Its totient is φ = 3866968.

The previous prime is 3866963. The next prime is 3866977. The reversal of 3866969 is 9696683.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3822025 + 44944 = 1955^2 + 212^2 .

It is a cyclic number.

It is not a de Polignac number, because 3866969 - 2⁸ = 3866713 is a prime.

It is a super-2 number, since 2×3866969² = 29906898493922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (3866963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1933484 + 1933485.

It is an arithmetic number, because the mean of its divisors is an integer number (1933485).

Almost surely, 2^3866969 is an apocalyptic number.

It is an amenable number.

3866969 is a deficient number, since it is larger than the sum of its proper divisors (1).

3866969 is an equidigital number, since it uses as much as digits as its factorization.

3866969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 419904, while the sum is 47.

The square root of 3866969 is about 1966.4610344474. The cubic root of 3866969 is about 156.9604482028.

The spelling of 3866969 in words is "three million, eight hundred sixty-six thousand, nine hundred sixty-nine".