11949509 has 8 divisors (see below), whose sum is σ = 14038752. Its totient is φ = 10027440.

The previous prime is 11949493. The next prime is 11949523. The reversal of 11949509 is 90594911.

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 11949509 - 2⁴ = 11949493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11949709) 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 in 7 ways as a sum of consecutive naturals, for example, 41639 + ... + 41924.

It is an arithmetic number, because the mean of its divisors is an integer number (1754844).

Almost surely, 2^11949509 is an apocalyptic number.

It is an amenable number.

11949509 is a deficient number, since it is larger than the sum of its proper divisors (2089243).

11949509 is a wasteful number, since it uses less digits than its factorization.

11949509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83587.

The product of its (nonzero) digits is 14580, while the sum is 38.

The square root of 11949509 is about 3456.8061849054. The cubic root of 11949509 is about 228.6212984006.

The spelling of 11949509 in words is "eleven million, nine hundred forty-nine thousand, five hundred nine".