13243537 has 2 divisors, whose sum is σ = 13243538. Its totient is φ = 13243536.

The previous prime is 13243471. The next prime is 13243547. The reversal of 13243537 is 73534231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11350161 + 1893376 = 3369^2 + 1376^2 .

It is a cyclic number.

It is not a de Polignac number, because 13243537 - 2⁷ = 13243409 is a prime.

It is not a weakly prime, because it can be changed into another prime (13243547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6621768 + 6621769.

It is an arithmetic number, because the mean of its divisors is an integer number (6621769).

Almost surely, 2^13243537 is an apocalyptic number.

It is an amenable number.

13243537 is a deficient number, since it is larger than the sum of its proper divisors (1).

13243537 is an equidigital number, since it uses as much as digits as its factorization.

13243537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 28.

The square root of 13243537 is about 3639.1670750324. The cubic root of 13243537 is about 236.5926941555.

Adding to 13243537 its reverse (73534231), we get a palindrome (86777768).

The spelling of 13243537 in words is "thirteen million, two hundred forty-three thousand, five hundred thirty-seven".