11539939 has 4 divisors (see below), whose sum is σ = 11645920. Its totient is φ = 11433960.

The previous prime is 11539937. The next prime is 11539943. The reversal of 11539939 is 93993511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11539939 - 2¹ = 11539937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11539937) 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 in 3 ways as a sum of consecutive naturals, for example, 52827 + ... + 53044.

It is an arithmetic number, because the mean of its divisors is an integer number (2911480).

Almost surely, 2^11539939 is an apocalyptic number.

11539939 is a deficient number, since it is larger than the sum of its proper divisors (105981).

11539939 is a wasteful number, since it uses less digits than its factorization.

11539939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105980.

The product of its digits is 32805, while the sum is 40.

The square root of 11539939 is about 3397.0485719224. The cubic root of 11539939 is about 225.9788726432.

The spelling of 11539939 in words is "eleven million, five hundred thirty-nine thousand, nine hundred thirty-nine".