13691023 has 4 divisors (see below), whose sum is σ = 13915528. Its totient is φ = 13466520.

The previous prime is 13690997. The next prime is 13691033. The reversal of 13691023 is 32019631.

13691023 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 an emirpimes, since its reverse is a distinct semiprime: 32019631 = 7 ⋅4574233.

It is a cyclic number.

It is not a de Polignac number, because 13691023 - 2⁹ = 13690511 is a prime.

It is a super-2 number, since 2×13691023² = 374888221573058, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13691033) 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, 112161 + ... + 112282.

It is an arithmetic number, because the mean of its divisors is an integer number (3478882).

Almost surely, 2^13691023 is an apocalyptic number.

13691023 is a deficient number, since it is larger than the sum of its proper divisors (224505).

13691023 is an equidigital number, since it uses as much as digits as its factorization.

13691023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224504.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 13691023 is about 3700.1382406607. The cubic root of 13691023 is about 239.2279764204.

The spelling of 13691023 in words is "thirteen million, six hundred ninety-one thousand, twenty-three".