11897199 has 20 divisors (see below), whose sum is σ = 17888640. Its totient is φ = 7879680.

The previous prime is 11897191. The next prime is 11897209. The reversal of 11897199 is 99179811.

It is not a de Polignac number, because 11897199 - 2³ = 11897191 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

Its product of digits (40824) is a multiple of the sum of its prime factors (972).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11897191) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 15087 + ... + 15855.

It is an arithmetic number, because the mean of its divisors is an integer number (894432).

Almost surely, 2^11897199 is an apocalyptic number.

11897199 is a deficient number, since it is larger than the sum of its proper divisors (5991441).

11897199 is an equidigital number, since it uses as much as digits as its factorization.

11897199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972 (or 963 counting only the distinct ones).

The product of its digits is 40824, while the sum is 45.

The square root of 11897199 is about 3449.2316535716. The cubic root of 11897199 is about 228.2872073105.

The spelling of 11897199 in words is "eleven million, eight hundred ninety-seven thousand, one hundred ninety-nine".