11810947 has 2 divisors, whose sum is σ = 11810948. Its totient is φ = 11810946.

The previous prime is 11810879. The next prime is 11810963. The reversal of 11810947 is 74901811.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11810947 is a prime.

It is not a weakly prime, because it can be changed into another prime (11810987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5905473 + 5905474.

It is an arithmetic number, because the mean of its divisors is an integer number (5905474).

Almost surely, 2^11810947 is an apocalyptic number.

11810947 is a deficient number, since it is larger than the sum of its proper divisors (1).

11810947 is an equidigital number, since it uses as much as digits as its factorization.

11810947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 31.

The square root of 11810947 is about 3436.7058355350. The cubic root of 11810947 is about 227.7341918762.

The spelling of 11810947 in words is "eleven million, eight hundred ten thousand, nine hundred forty-seven".