11071999 has 4 divisors (see below), whose sum is σ = 11259720. Its totient is φ = 10884280.

The previous prime is 11071979. The next prime is 11072029. The reversal of 11071999 is 99917011.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11071999 - 2¹⁷ = 10940927 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 (11071969) 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, 93772 + ... + 93889.

It is an arithmetic number, because the mean of its divisors is an integer number (2814930).

Almost surely, 2^11071999 is an apocalyptic number.

11071999 is a deficient number, since it is larger than the sum of its proper divisors (187721).

11071999 is an equidigital number, since it uses as much as digits as its factorization.

11071999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187720.

The product of its (nonzero) digits is 5103, while the sum is 37.

The square root of 11071999 is about 3327.4613446290. The cubic root of 11071999 is about 222.8821795116.

The spelling of 11071999 in words is "eleven million, seventy-one thousand, nine hundred ninety-nine".