13581137 has 2 divisors, whose sum is σ = 13581138. Its totient is φ = 13581136.

The previous prime is 13581121. The next prime is 13581149. The reversal of 13581137 is 73118531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11282881 + 2298256 = 3359^2 + 1516^2 .

It is a cyclic number.

It is not a de Polignac number, because 13581137 - 2⁴ = 13581121 is a prime.

It is not a weakly prime, because it can be changed into another prime (13581107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6790568 + 6790569.

It is an arithmetic number, because the mean of its divisors is an integer number (6790569).

Almost surely, 2^13581137 is an apocalyptic number.

It is an amenable number.

13581137 is a deficient number, since it is larger than the sum of its proper divisors (1).

13581137 is an equidigital number, since it uses as much as digits as its factorization.

13581137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 29.

The square root of 13581137 is about 3685.2594209906. The cubic root of 13581137 is about 238.5862310829.

Adding to 13581137 its reverse (73118531), we get a palindrome (86699668).

The spelling of 13581137 in words is "thirteen million, five hundred eighty-one thousand, one hundred thirty-seven".