11729855 has 4 divisors (see below), whose sum is σ = 14075832. Its totient is φ = 9383880.

The previous prime is 11729843. The next prime is 11729857. The reversal of 11729855 is 55892711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55892711 = 7 ⋅7984673.

It is not a de Polignac number, because 11729855 - 2⁶ = 11729791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11729857) 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, 1172981 + ... + 1172990.

It is an arithmetic number, because the mean of its divisors is an integer number (3518958).

Almost surely, 2^11729855 is an apocalyptic number.

11729855 is a deficient number, since it is larger than the sum of its proper divisors (2345977).

11729855 is an equidigital number, since it uses as much as digits as its factorization.

11729855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2345976.

The product of its digits is 25200, while the sum is 38.

The square root of 11729855 is about 3424.8875893962. The cubic root of 11729855 is about 227.2117994496.

The spelling of 11729855 in words is "eleven million, seven hundred twenty-nine thousand, eight hundred fifty-five".