13604331 has 12 divisors (see below), whose sum is σ = 19642488. Its totient is φ = 8371584.

The previous prime is 13604317. The next prime is 13604341. The reversal of 13604331 is 13340631.

It is not a de Polignac number, because 13604331 - 2⁵ = 13604299 is a prime.

It is a super-2 number, since 2×13604331² = 370155643915122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13604298 and 13604307.

It is not an unprimeable number, because it can be changed into a prime (13604341) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12910 + ... + 13923.

It is an arithmetic number, because the mean of its divisors is an integer number (1636874).

Almost surely, 2^13604331 is an apocalyptic number.

13604331 is a deficient number, since it is larger than the sum of its proper divisors (6038157).

13604331 is a wasteful number, since it uses less digits than its factorization.

13604331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26862 (or 26849 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 13604331 is about 3688.4049398080. The cubic root of 13604331 is about 238.7219738124.

Adding to 13604331 its reverse (13340631), we get a palindrome (26944962).

The spelling of 13604331 in words is "thirteen million, six hundred four thousand, three hundred thirty-one".