11478947 has 2 divisors, whose sum is σ = 11478948. Its totient is φ = 11478946.

The previous prime is 11478941. The next prime is 11478967. The reversal of 11478947 is 74987411.

It is a weak prime.

It is an emirp because it is prime and its reverse (74987411) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11478947 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11478941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5739473 + 5739474.

It is an arithmetic number, because the mean of its divisors is an integer number (5739474).

Almost surely, 2^11478947 is an apocalyptic number.

11478947 is a deficient number, since it is larger than the sum of its proper divisors (1).

11478947 is an equidigital number, since it uses as much as digits as its factorization.

11478947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 41.

The square root of 11478947 is about 3388.0594740943. The cubic root of 11478947 is about 225.5800473925.

The spelling of 11478947 in words is "eleven million, four hundred seventy-eight thousand, nine hundred forty-seven".