13409738 has 4 divisors (see below), whose sum is σ = 20114610. Its totient is φ = 6704868.

The previous prime is 13409717. The next prime is 13409741. The reversal of 13409738 is 83790431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83790431 = 307 ⋅272933.

It can be written as a sum of positive squares in only one way, i.e., 12866569 + 543169 = 3587^2 + 737^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13409698 and 13409707.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3352433 + ... + 3352436.

Almost surely, 2^13409738 is an apocalyptic number.

13409738 is a deficient number, since it is larger than the sum of its proper divisors (6704872).

13409738 is an equidigital number, since it uses as much as digits as its factorization.

13409738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6704871.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 13409738 is about 3661.9309114182. The cubic root of 13409738 is about 237.5782966228.

The spelling of 13409738 in words is "thirteen million, four hundred nine thousand, seven hundred thirty-eight".