11420947 has 2 divisors, whose sum is σ = 11420948. Its totient is φ = 11420946.

The previous prime is 11420939. The next prime is 11420971. The reversal of 11420947 is 74902411.

It is a weak prime.

It is an emirp because it is prime and its reverse (74902411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11420947 - 2³ = 11420939 is a prime.

It is not a weakly prime, because it can be changed into another prime (11420347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5710473 + 5710474.

It is an arithmetic number, because the mean of its divisors is an integer number (5710474).

Almost surely, 2^11420947 is an apocalyptic number.

11420947 is a deficient number, since it is larger than the sum of its proper divisors (1).

11420947 is an equidigital number, since it uses as much as digits as its factorization.

11420947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 11420947 is about 3379.4891625806. The cubic root of 11420947 is about 225.1994741324.

The spelling of 11420947 in words is "eleven million, four hundred twenty thousand, nine hundred forty-seven".