13643732 has 6 divisors (see below), whose sum is σ = 23876538. Its totient is φ = 6821864.

The previous prime is 13643731. The next prime is 13643743. The reversal of 13643732 is 23734631.

It is a happy number.

13643732 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 10010896 + 3632836 = 3164^2 + 1906^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13643695 and 13643704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13643731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1705463 + ... + 1705470.

It is an arithmetic number, because the mean of its divisors is an integer number (3979423).

Almost surely, 2^13643732 is an apocalyptic number.

It is an amenable number.

13643732 is a deficient number, since it is larger than the sum of its proper divisors (10232806).

13643732 is a wasteful number, since it uses less digits than its factorization.

13643732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3410937 (or 3410935 counting only the distinct ones).

The product of its digits is 9072, while the sum is 29.

The square root of 13643732 is about 3693.7422757956. The cubic root of 13643732 is about 238.9522146723.

The spelling of 13643732 in words is "thirteen million, six hundred forty-three thousand, seven hundred thirty-two".