11057947 has 4 divisors (see below), whose sum is σ = 11105640. Its totient is φ = 11010256.

The previous prime is 11057933. The next prime is 11057951. The reversal of 11057947 is 74975011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74975011 = 47 ⋅1595213.

It is a cyclic number.

It is not a de Polignac number, because 11057947 - 2²³ = 2669339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11057927) 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, 23497 + ... + 23962.

It is an arithmetic number, because the mean of its divisors is an integer number (2776410).

Almost surely, 2^11057947 is an apocalyptic number.

11057947 is a deficient number, since it is larger than the sum of its proper divisors (47693).

11057947 is an equidigital number, since it uses as much as digits as its factorization.

11057947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47692.

The product of its (nonzero) digits is 8820, while the sum is 34.

The square root of 11057947 is about 3325.3491546002. The cubic root of 11057947 is about 222.7878494728.

The spelling of 11057947 in words is "eleven million, fifty-seven thousand, nine hundred forty-seven".