13491723 has 32 divisors (see below), whose sum is σ = 21446656. Its totient is φ = 7384608.

The previous prime is 13491721. The next prime is 13491743. The reversal of 13491723 is 32719431.

It is not a de Polignac number, because 13491723 - 2¹ = 13491721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13491721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60390 + ... + 60612.

It is an arithmetic number, because the mean of its divisors is an integer number (670208).

Almost surely, 2^13491723 is an apocalyptic number.

13491723 is a deficient number, since it is larger than the sum of its proper divisors (7954933).

13491723 is a wasteful number, since it uses less digits than its factorization.

13491723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343.

The product of its digits is 4536, while the sum is 30.

The square root of 13491723 is about 3673.1080844429. The cubic root of 13491723 is about 238.0614851855.

It can be divided in two parts, 134917 and 23, that added together give a triangular number (134940 = T₅₁₉).

The spelling of 13491723 in words is "thirteen million, four hundred ninety-one thousand, seven hundred twenty-three".