13409629 has 4 divisors (see below), whose sum is σ = 13872060. Its totient is φ = 12947200.

The previous prime is 13409603. The next prime is 13409633. The reversal of 13409629 is 92690431.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11546404 + 1863225 = 3398^2 + 1365^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13409629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13409594 and 13409603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13403629) 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, 231172 + ... + 231229.

It is an arithmetic number, because the mean of its divisors is an integer number (3468015).

Almost surely, 2^13409629 is an apocalyptic number.

It is an amenable number.

13409629 is a deficient number, since it is larger than the sum of its proper divisors (462431).

13409629 is an equidigital number, since it uses as much as digits as its factorization.

13409629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462430.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 13409629 is about 3661.9160285293. The cubic root of 13409629 is about 237.5776529089.

It can be divided in two parts, 134096 and 29, that multiplied together give a square (3888784 = 1972²).

The spelling of 13409629 in words is "thirteen million, four hundred nine thousand, six hundred twenty-nine".