11669899 has 4 divisors (see below), whose sum is σ = 11941336. Its totient is φ = 11398464.

The previous prime is 11669891. The next prime is 11669921. The reversal of 11669899 is 99896611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99896611 = 43 ⋅2323177.

It is a cyclic number.

It is not a de Polignac number, because 11669899 - 2³ = 11669891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11669891) 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, 135654 + ... + 135739.

It is an arithmetic number, because the mean of its divisors is an integer number (2985334).

Almost surely, 2^11669899 is an apocalyptic number.

11669899 is a deficient number, since it is larger than the sum of its proper divisors (271437).

11669899 is an equidigital number, since it uses as much as digits as its factorization.

11669899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271436.

The product of its digits is 209952, while the sum is 49.

The square root of 11669899 is about 3416.1233877013. The cubic root of 11669899 is about 226.8240144013.

The spelling of 11669899 in words is "eleven million, six hundred sixty-nine thousand, eight hundred ninety-nine".