11909899 has 2 divisors, whose sum is σ = 11909900. Its totient is φ = 11909898.

The previous prime is 11909897. The next prime is 11909927. The reversal of 11909899 is 99890911.

11909899 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11909899 - 2¹ = 11909897 is a prime.

Together with 11909897, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11909897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5954949 + 5954950.

It is an arithmetic number, because the mean of its divisors is an integer number (5954950).

Almost surely, 2^11909899 is an apocalyptic number.

11909899 is a deficient number, since it is larger than the sum of its proper divisors (1).

11909899 is an equidigital number, since it uses as much as digits as its factorization.

11909899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 46.

The square root of 11909899 is about 3451.0721522449. The cubic root of 11909899 is about 228.3684089591.

The spelling of 11909899 in words is "eleven million, nine hundred nine thousand, eight hundred ninety-nine".