13413581 has 2 divisors, whose sum is σ = 13413582. Its totient is φ = 13413580.

The previous prime is 13413559. The next prime is 13413593. The reversal of 13413581 is 18531431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12716356 + 697225 = 3566^2 + 835^2 .

It is a cyclic number.

It is not a de Polignac number, because 13413581 - 2²² = 9219277 is a prime.

It is a super-2 number, since 2×13413581² = 359848310487122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13413581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13413511) by changing a digit.

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, 6706790 + 6706791.

It is an arithmetic number, because the mean of its divisors is an integer number (6706791).

Almost surely, 2^13413581 is an apocalyptic number.

It is an amenable number.

13413581 is a deficient number, since it is larger than the sum of its proper divisors (1).

13413581 is an equidigital number, since it uses as much as digits as its factorization.

13413581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 26.

The square root of 13413581 is about 3662.4555970005. The cubic root of 13413581 is about 237.6009897380.

The spelling of 13413581 in words is "thirteen million, four hundred thirteen thousand, five hundred eighty-one".