13011691 has 16 divisors (see below), whose sum is σ = 16784640. Its totient is φ = 9787680.

The previous prime is 13011641. The next prime is 13011697. The reversal of 13011691 is 19611031.

It is a happy number.

It is not a de Polignac number, because 13011691 - 2⁷ = 13011563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13011697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 681 + ... + 5146.

It is an arithmetic number, because the mean of its divisors is an integer number (1049040).

Almost surely, 2^13011691 is an apocalyptic number.

13011691 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13011691 is a deficient number, since it is larger than the sum of its proper divisors (3772949).

13011691 is a wasteful number, since it uses less digits than its factorization.

13011691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5874.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 13011691 is about 3607.1721611257. The cubic root of 13011691 is about 235.2039334322.

It can be divided in two parts, 1301 and 1691, that added together give a palindrome (2992).

The spelling of 13011691 in words is "thirteen million, eleven thousand, six hundred ninety-one".