11909647 has 2 divisors, whose sum is σ = 11909648. Its totient is φ = 11909646.

The previous prime is 11909621. The next prime is 11909657. The reversal of 11909647 is 74690911.

11909647 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11909647 - 2⁷ = 11909519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11909657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5954823 + 5954824.

It is an arithmetic number, because the mean of its divisors is an integer number (5954824).

Almost surely, 2^11909647 is an apocalyptic number.

11909647 is a deficient number, since it is larger than the sum of its proper divisors (1).

11909647 is an equidigital number, since it uses as much as digits as its factorization.

11909647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 11909647 is about 3451.0356416589. The cubic root of 11909647 is about 228.3667982753.

The spelling of 11909647 in words is "eleven million, nine hundred nine thousand, six hundred forty-seven".