11057999 has 4 divisors (see below), whose sum is σ = 11064840. Its totient is φ = 11051160.

The previous prime is 11057953. The next prime is 11058001. The reversal of 11057999 is 99975011.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 99975011 = 17 ⋅5880883.

It is a cyclic number.

It is not a de Polignac number, because 11057999 - 2⁸ = 11057743 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 (11057909) 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, 512 + ... + 4730.

It is an arithmetic number, because the mean of its divisors is an integer number (2766210).

Almost surely, 2^11057999 is an apocalyptic number.

11057999 is a deficient number, since it is larger than the sum of its proper divisors (6841).

11057999 is an equidigital number, since it uses as much as digits as its factorization.

11057999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6840.

The product of its (nonzero) digits is 25515, while the sum is 41.

The square root of 11057999 is about 3325.3569733188. The cubic root of 11057999 is about 222.7881986922.

The spelling of 11057999 in words is "eleven million, fifty-seven thousand, nine hundred ninety-nine".