11947907 has 4 divisors (see below), whose sum is σ = 12035256. Its totient is φ = 11860560.

The previous prime is 11947891. The next prime is 11947931. The reversal of 11947907 is 70974911.

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 11947907 - 2⁴ = 11947891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11947007) 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 3 ways as a sum of consecutive naturals, for example, 43469 + ... + 43742.

It is an arithmetic number, because the mean of its divisors is an integer number (3008814).

Almost surely, 2^11947907 is an apocalyptic number.

11947907 is a deficient number, since it is larger than the sum of its proper divisors (87349).

11947907 is an equidigital number, since it uses as much as digits as its factorization.

11947907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87348.

The product of its (nonzero) digits is 15876, while the sum is 38.

The square root of 11947907 is about 3456.5744603581. The cubic root of 11947907 is about 228.6110813089.

The spelling of 11947907 in words is "eleven million, nine hundred forty-seven thousand, nine hundred seven".