10993391 has 4 divisors (see below), whose sum is σ = 11002272. Its totient is φ = 10984512.

The previous prime is 10993361. The next prime is 10993393. The reversal of 10993391 is 19339901.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10993391 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 (10993393) 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, 2210 + ... + 5183.

It is an arithmetic number, because the mean of its divisors is an integer number (2750568).

Almost surely, 2^10993391 is an apocalyptic number.

10993391 is a deficient number, since it is larger than the sum of its proper divisors (8881).

10993391 is an equidigital number, since it uses as much as digits as its factorization.

10993391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8880.

The product of its (nonzero) digits is 6561, while the sum is 35.

The square root of 10993391 is about 3315.6282964168. The cubic root of 10993391 is about 222.3534598779.

The spelling of 10993391 in words is "ten million, nine hundred ninety-three thousand, three hundred ninety-one".