11967647 has 4 divisors (see below), whose sum is σ = 11974776. Its totient is φ = 11960520.

The previous prime is 11967617. The next prime is 11967649. The reversal of 11967647 is 74676911.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 74676911 = 193 ⋅386927.

It is a cyclic number.

It is not a de Polignac number, because 11967647 - 2⁶ = 11967583 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 (11967649) 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, 497 + ... + 4917.

It is an arithmetic number, because the mean of its divisors is an integer number (2993694).

Almost surely, 2^11967647 is an apocalyptic number.

11967647 is a deficient number, since it is larger than the sum of its proper divisors (7129).

11967647 is an equidigital number, since it uses as much as digits as its factorization.

11967647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7128.

The product of its digits is 63504, while the sum is 41.

The square root of 11967647 is about 3459.4287100618. The cubic root of 11967647 is about 228.7369136611.

The spelling of 11967647 in words is "eleven million, nine hundred sixty-seven thousand, six hundred forty-seven".