13161749 has 4 divisors (see below), whose sum is σ = 13284864. Its totient is φ = 13038636.

The previous prime is 13161703. The next prime is 13161769. The reversal of 13161749 is 94716131.

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 an emirpimes, since its reverse is a distinct semiprime: 94716131 = 233 ⋅406507.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13161749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13161769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61397 + ... + 61610.

It is an arithmetic number, because the mean of its divisors is an integer number (3321216).

Almost surely, 2^13161749 is an apocalyptic number.

It is an amenable number.

13161749 is a deficient number, since it is larger than the sum of its proper divisors (123115).

13161749 is a wasteful number, since it uses less digits than its factorization.

13161749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123114.

The product of its digits is 4536, while the sum is 32.

The square root of 13161749 is about 3627.9124851628. The cubic root of 13161749 is about 236.1046469259.

It can be divided in two parts, 13161 and 749, that multiplied together give a palindrome (9857589).

The spelling of 13161749 in words is "thirteen million, one hundred sixty-one thousand, seven hundred forty-nine".