3976409 has 2 divisors, whose sum is σ = 3976410. Its totient is φ = 3976408.

The previous prime is 3976403. The next prime is 3976417. The reversal of 3976409 is 9046793.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3115225 + 861184 = 1765^2 + 928^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3976409 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3976403) 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, 1988204 + 1988205.

It is an arithmetic number, because the mean of its divisors is an integer number (1988205).

Almost surely, 2^3976409 is an apocalyptic number.

It is an amenable number.

3976409 is a deficient number, since it is larger than the sum of its proper divisors (1).

3976409 is an equidigital number, since it uses as much as digits as its factorization.

3976409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 3976409 is about 1994.0935283983. The cubic root of 3976409 is about 158.4274198570.

The spelling of 3976409 in words is "three million, nine hundred seventy-six thousand, four hundred nine".