11399311 has 12 divisors (see below), whose sum is σ = 14466600. Its totient is φ = 8882160.

The previous prime is 11399287. The next prime is 11399321.

11399311 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 11399311 - 2⁵ = 11399279 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11399311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11399321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10036 + ... + 11113.

It is an arithmetic number, because the mean of its divisors is an integer number (1205550).

Almost surely, 2^11399311 is an apocalyptic number.

11399311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11399311 is a deficient number, since it is larger than the sum of its proper divisors (3067289).

11399311 is a wasteful number, since it uses less digits than its factorization.

11399311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21174 (or 21167 counting only the distinct ones).

The product of its digits is 729, while the sum is 28.

The square root of 11399311 is about 3376.2865695909. The cubic root of 11399311 is about 225.0571772384.

The spelling of 11399311 in words is "eleven million, three hundred ninety-nine thousand, three hundred eleven".