10891199 has 24 divisors (see below), whose sum is σ = 13232640. Its totient is φ = 8856000.

The previous prime is 10891193. The next prime is 10891201. The reversal of 10891199 is 99119801.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-10891199 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 (10891193) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 265619 + ... + 265659.

It is an arithmetic number, because the mean of its divisors is an integer number (551360).

Almost surely, 2^10891199 is an apocalyptic number.

10891199 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

10891199 is a deficient number, since it is larger than the sum of its proper divisors (2341441).

10891199 is a wasteful number, since it uses less digits than its factorization.

10891199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143 (or 102 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 38.

The square root of 10891199 is about 3300.1816616665. The cubic root of 10891199 is about 221.6623319358.

The spelling of 10891199 in words is "ten million, eight hundred ninety-one thousand, one hundred ninety-nine".