11681747 has 12 divisors (see below), whose sum is σ = 14825016. Its totient is φ = 9102240.

The previous prime is 11681741. The next prime is 11681773. The reversal of 11681747 is 74718611.

It is not a de Polignac number, because 11681747 - 2⁴ = 11681731 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11681741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10298 + ... + 11375.

It is an arithmetic number, because the mean of its divisors is an integer number (1235418).

Almost surely, 2^11681747 is an apocalyptic number.

11681747 is a deficient number, since it is larger than the sum of its proper divisors (3143269).

11681747 is a wasteful number, since it uses less digits than its factorization.

11681747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21698 (or 21691 counting only the distinct ones).

The product of its digits is 9408, while the sum is 35.

The square root of 11681747 is about 3417.8570771757. The cubic root of 11681747 is about 226.9007503399.

The spelling of 11681747 in words is "eleven million, six hundred eighty-one thousand, seven hundred forty-seven".