11955791 has 4 divisors (see below), whose sum is σ = 12475632. Its totient is φ = 11435952.

The previous prime is 11955767. The next prime is 11955799. The reversal of 11955791 is 19755911.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11955791 - 2¹⁴ = 11939407 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 (11955799) 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, 259886 + ... + 259931.

It is an arithmetic number, because the mean of its divisors is an integer number (3118908).

Almost surely, 2^11955791 is an apocalyptic number.

11955791 is a deficient number, since it is larger than the sum of its proper divisors (519841).

11955791 is an equidigital number, since it uses as much as digits as its factorization.

11955791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519840.

The product of its digits is 14175, while the sum is 38.

The square root of 11955791 is about 3457.7147077224. The cubic root of 11955791 is about 228.6613543670.

The spelling of 11955791 in words is "eleven million, nine hundred fifty-five thousand, seven hundred ninety-one".