10991017 has 4 divisors (see below), whose sum is σ = 10999120. Its totient is φ = 10982916.

The previous prime is 10991011. The next prime is 10991021. The reversal of 10991017 is 71019901.

10991017 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, and also an emirpimes, since its reverse is a distinct semiprime: 71019901 = 227 ⋅312863.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10991017 is a prime.

It is a pancake number, because a pancake can be divided into 10991017 parts by 4688 straight cuts.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10991011) 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, 1467 + ... + 4912.

It is an arithmetic number, because the mean of its divisors is an integer number (2749780).

Almost surely, 2^10991017 is an apocalyptic number.

It is an amenable number.

10991017 is a deficient number, since it is larger than the sum of its proper divisors (8103).

10991017 is an equidigital number, since it uses as much as digits as its factorization.

10991017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8102.

The product of its (nonzero) digits is 567, while the sum is 28.

The square root of 10991017 is about 3315.2702755582. The cubic root of 10991017 is about 222.3374531361.

It can be divided in two parts, 1099 and 1017, that added together give a square (2116 = 46²).

The spelling of 10991017 in words is "ten million, nine hundred ninety-one thousand, seventeen".