11729161 has 4 divisors (see below), whose sum is σ = 11736900. Its totient is φ = 11721424.

The previous prime is 11729147. The next prime is 11729171. The reversal of 11729161 is 16192711.

11729161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2310400 + 9418761 = 1520^2 + 3069^2 .

It is a cyclic number.

It is not a de Polignac number, because 11729161 - 2⁹ = 11728649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11729171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 766 + ... + 4903.

It is an arithmetic number, because the mean of its divisors is an integer number (2934225).

Almost surely, 2^11729161 is an apocalyptic number.

It is an amenable number.

11729161 is a deficient number, since it is larger than the sum of its proper divisors (7739).

11729161 is an equidigital number, since it uses as much as digits as its factorization.

11729161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7738.

The product of its digits is 756, while the sum is 28.

The square root of 11729161 is about 3424.7862707036. The cubic root of 11729161 is about 227.2073183456.

The spelling of 11729161 in words is "eleven million, seven hundred twenty-nine thousand, one hundred sixty-one".