10891913 has 4 divisors (see below), whose sum is σ = 10902528. Its totient is φ = 10881300.

The previous prime is 10891891. The next prime is 10891919. The reversal of 10891913 is 31919801.

10891913 is digitally balanced in base 3, 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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 10891913 - 2¹⁶ = 10826377 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 10891913.

It is not an unprimeable number, because it can be changed into a prime (10891919) 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, 3581 + ... + 5882.

It is an arithmetic number, because the mean of its divisors is an integer number (2725632).

Almost surely, 2^10891913 is an apocalyptic number.

It is an amenable number.

10891913 is a deficient number, since it is larger than the sum of its proper divisors (10615).

10891913 is an equidigital number, since it uses as much as digits as its factorization.

10891913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10614.

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

The square root of 10891913 is about 3300.2898357569. The cubic root of 10891913 is about 221.6671757075.

The spelling of 10891913 in words is "ten million, eight hundred ninety-one thousand, nine hundred thirteen".