13604531 has 2 divisors, whose sum is σ = 13604532. Its totient is φ = 13604530.

The previous prime is 13604519. The next prime is 13604533. The reversal of 13604531 is 13540631.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13604531 - 2⁶ = 13604467 is a prime.

It is a super-2 number, since 2×13604531² = 370166527459922, which contains 22 as substring.

Together with 13604533, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 13604497 and 13604506.

It is not a weakly prime, because it can be changed into another prime (13604533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6802265 + 6802266.

It is an arithmetic number, because the mean of its divisors is an integer number (6802266).

Almost surely, 2^13604531 is an apocalyptic number.

13604531 is a deficient number, since it is larger than the sum of its proper divisors (1).

13604531 is an equidigital number, since it uses as much as digits as its factorization.

13604531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 13604531 is about 3688.4320516989. The cubic root of 13604531 is about 238.7231436399.

The spelling of 13604531 in words is "thirteen million, six hundred four thousand, five hundred thirty-one".