10891993 has 4 divisors (see below), whose sum is σ = 12448000. Its totient is φ = 9335988.

The previous prime is 10891987. The next prime is 10891999. The reversal of 10891993 is 39919801.

10891993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (10891987) and next prime (10891999).

It is a cyclic number.

It is not a de Polignac number, because 10891993 - 2⁵ = 10891961 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (10891999) 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, 777993 + ... + 778006.

It is an arithmetic number, because the mean of its divisors is an integer number (3112000).

Almost surely, 2^10891993 is an apocalyptic number.

It is an amenable number.

10891993 is a deficient number, since it is larger than the sum of its proper divisors (1556007).

10891993 is an equidigital number, since it uses as much as digits as its factorization.

10891993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1556006.

The product of its (nonzero) digits is 17496, while the sum is 40.

The square root of 10891993 is about 3300.3019558822. The cubic root of 10891993 is about 221.6677184139.

The spelling of 10891993 in words is "ten million, eight hundred ninety-one thousand, nine hundred ninety-three".