13606399 has 4 divisors (see below), whose sum is σ = 13713664. Its totient is φ = 13499136.

The previous prime is 13606393. The next prime is 13606421. The reversal of 13606399 is 99360631.

13606399 = T₁₉₂ + T₁₉₃ + ... + T₄₄₅.

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

It is a cyclic number.

It is not a de Polignac number, because 13606399 - 2³ = 13606391 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 (13606391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53442 + ... + 53695.

It is an arithmetic number, because the mean of its divisors is an integer number (3428416).

Almost surely, 2^13606399 is an apocalyptic number.

13606399 is a deficient number, since it is larger than the sum of its proper divisors (107265).

13606399 is a wasteful number, since it uses less digits than its factorization.

13606399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107264.

The product of its (nonzero) digits is 26244, while the sum is 37.

The square root of 13606399 is about 3688.6852671379. The cubic root of 13606399 is about 238.7340692750.

The spelling of 13606399 in words is "thirteen million, six hundred six thousand, three hundred ninety-nine".