11802409 has 2 divisors, whose sum is σ = 11802410. Its totient is φ = 11802408.

The previous prime is 11802397. The next prime is 11802443. The reversal of 11802409 is 90420811.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10530025 + 1272384 = 3245^2 + 1128^2 .

It is a cyclic number.

It is not a de Polignac number, because 11802409 - 2⁵ = 11802377 is a prime.

It is not a weakly prime, because it can be changed into another prime (11802209) 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, 5901204 + 5901205.

It is an arithmetic number, because the mean of its divisors is an integer number (5901205).

Almost surely, 2^11802409 is an apocalyptic number.

It is an amenable number.

11802409 is a deficient number, since it is larger than the sum of its proper divisors (1).

11802409 is an equidigital number, since it uses as much as digits as its factorization.

11802409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 11802409 is about 3435.4634330757. The cubic root of 11802409 is about 227.6793031574.

The spelling of 11802409 in words is "eleven million, eight hundred two thousand, four hundred nine".