11839649 has 4 divisors (see below), whose sum is σ = 11930160. Its totient is φ = 11749140.

The previous prime is 11839643. The next prime is 11839661. The reversal of 11839649 is 94693811.

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 a de Polignac number, because none of the positive numbers 2^k-11839649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11839643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45059 + ... + 45320.

It is an arithmetic number, because the mean of its divisors is an integer number (2982540).

Almost surely, 2^11839649 is an apocalyptic number.

It is an amenable number.

11839649 is a deficient number, since it is larger than the sum of its proper divisors (90511).

11839649 is an equidigital number, since it uses as much as digits as its factorization.

11839649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90510.

The product of its digits is 46656, while the sum is 41.

The square root of 11839649 is about 3440.8791027875. The cubic root of 11839649 is about 227.9185163324.

The spelling of 11839649 in words is "eleven million, eight hundred thirty-nine thousand, six hundred forty-nine".