13604431 has 8 divisors (see below), whose sum is σ = 14246784. Its totient is φ = 12966360.

The previous prime is 13604413. The next prime is 13604441. The reversal of 13604431 is 13440631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13604431 - 2¹⁷ = 13473359 is a prime.

It is a super-3 number, since 3×13604431³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13604401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6720 + ... + 8506.

It is an arithmetic number, because the mean of its divisors is an integer number (1780848).

Almost surely, 2^13604431 is an apocalyptic number.

13604431 is a deficient number, since it is larger than the sum of its proper divisors (642353).

13604431 is a wasteful number, since it uses less digits than its factorization.

13604431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2141.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 13604431 is about 3688.4184957784. The cubic root of 13604431 is about 238.7225587276.

The spelling of 13604431 in words is "thirteen million, six hundred four thousand, four hundred thirty-one".