11081399 has 24 divisors (see below), whose sum is σ = 13961808. Its totient is φ = 8736000.

The previous prime is 11081387. The next prime is 11081407. The reversal of 11081399 is 99318011.

11081399 = 431² + 432² + ... + 483².

It is not a de Polignac number, because 11081399 - 2⁴ = 11081383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11081309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44024 + ... + 44274.

It is an arithmetic number, because the mean of its divisors is an integer number (581742).

Almost surely, 2^11081399 is an apocalyptic number.

11081399 is a deficient number, since it is larger than the sum of its proper divisors (2880409).

11081399 is a wasteful number, since it uses less digits than its factorization.

11081399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 32.

The square root of 11081399 is about 3328.8735331941. The cubic root of 11081399 is about 222.9452364737.

The spelling of 11081399 in words is "eleven million, eighty-one thousand, three hundred ninety-nine".