11942909 has 4 divisors (see below), whose sum is σ = 13028640. Its totient is φ = 10857180.

The previous prime is 11942899. The next prime is 11942921. The reversal of 11942909 is 90924911.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11942909 - 2⁴ = 11942893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11942929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 542849 + ... + 542870.

It is an arithmetic number, because the mean of its divisors is an integer number (3257160).

Almost surely, 2^11942909 is an apocalyptic number.

It is an amenable number.

11942909 is a deficient number, since it is larger than the sum of its proper divisors (1085731).

11942909 is a wasteful number, since it uses less digits than its factorization.

11942909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1085730.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 11942909 is about 3455.8514146300. The cubic root of 11942909 is about 228.5791996428.

The spelling of 11942909 in words is "eleven million, nine hundred forty-two thousand, nine hundred nine".