13629749 has 4 divisors (see below), whose sum is σ = 15576864. Its totient is φ = 11682636.

The previous prime is 13629697. The next prime is 13629751. The reversal of 13629749 is 94792631.

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: 94792631 = 37 ⋅2561963.

It is a de Polignac number, because none of the positive numbers 2^k-13629749 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13629769) 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, 973547 + ... + 973560.

It is an arithmetic number, because the mean of its divisors is an integer number (3894216).

Almost surely, 2^13629749 is an apocalyptic number.

It is an amenable number.

13629749 is a deficient number, since it is larger than the sum of its proper divisors (1947115).

13629749 is an equidigital number, since it uses as much as digits as its factorization.

13629749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1947114.

The product of its digits is 81648, while the sum is 41.

The square root of 13629749 is about 3691.8489947450. The cubic root of 13629749 is about 238.8705554185.

It can be divided in two parts, 1362 and 9749, that added together give a palindrome (11111).

The spelling of 13629749 in words is "thirteen million, six hundred twenty-nine thousand, seven hundred forty-nine".