11955999 has 8 divisors (see below), whose sum is σ = 17390592. Its totient is φ = 7246040.

The previous prime is 11955989. The next prime is 11956003. The reversal of 11955999 is 99955911.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11955999 - 2⁷ = 11955871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11955989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181119 + ... + 181184.

It is an arithmetic number, because the mean of its divisors is an integer number (2173824).

Almost surely, 2^11955999 is an apocalyptic number.

11955999 is a deficient number, since it is larger than the sum of its proper divisors (5434593).

11955999 is a wasteful number, since it uses less digits than its factorization.

11955999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362317.

The product of its digits is 164025, while the sum is 48.

The square root of 11955999 is about 3457.7447852611. The cubic root of 11955999 is about 228.6626803991.

The spelling of 11955999 in words is "eleven million, nine hundred fifty-five thousand, nine hundred ninety-nine".