11949409 has 8 divisors (see below), whose sum is σ = 12573288. Its totient is φ = 11341440.

The previous prime is 11949389. The next prime is 11949437. The reversal of 11949409 is 90494911.

11949409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 253009 + 11696400 = 503^2 + 3420^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11949409 - 2⁷ = 11949281 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11949709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2422 + ... + 5455.

It is an arithmetic number, because the mean of its divisors is an integer number (1571661).

Almost surely, 2^11949409 is an apocalyptic number.

It is an amenable number.

11949409 is a deficient number, since it is larger than the sum of its proper divisors (623879).

11949409 is an equidigital number, since it uses as much as digits as its factorization.

11949409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7955.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 11949409 is about 3456.7917206566. The cubic root of 11949409 is about 228.6206606563.

The spelling of 11949409 in words is "eleven million, nine hundred forty-nine thousand, four hundred nine".