12013637 has 2 divisors, whose sum is σ = 12013638. Its totient is φ = 12013636.

The previous prime is 12013621. The next prime is 12013663. The reversal of 12013637 is 73631021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11930116 + 83521 = 3454^2 + 289^2 .

It is a cyclic number.

It is not a de Polignac number, because 12013637 - 2⁴ = 12013621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12018637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6006818 + 6006819.

It is an arithmetic number, because the mean of its divisors is an integer number (6006819).

Almost surely, 2^12013637 is an apocalyptic number.

It is an amenable number.

12013637 is a deficient number, since it is larger than the sum of its proper divisors (1).

12013637 is an equidigital number, since it uses as much as digits as its factorization.

12013637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 12013637 is about 3466.0693876494. The cubic root of 12013637 is about 229.0295405025.

Adding to 12013637 its reverse (73631021), we get a palindrome (85644658).

The spelling of 12013637 in words is "twelve million, thirteen thousand, six hundred thirty-seven".