10991383 has 4 divisors (see below), whose sum is σ = 11836888. Its totient is φ = 10145880.

The previous prime is 10991381. The next prime is 10991399. The reversal of 10991383 is 38319901.

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 10991383 - 2¹ = 10991381 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 (10991381) 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, 422733 + ... + 422758.

It is an arithmetic number, because the mean of its divisors is an integer number (2959222).

Almost surely, 2^10991383 is an apocalyptic number.

10991383 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

10991383 is a deficient number, since it is larger than the sum of its proper divisors (845505).

10991383 is an equidigital number, since it uses as much as digits as its factorization.

10991383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845504.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 10991383 is about 3315.3254742182. The cubic root of 10991383 is about 222.3399210486.

The spelling of 10991383 in words is "ten million, nine hundred ninety-one thousand, three hundred eighty-three".