12537389 has 2 divisors, whose sum is σ = 12537390. Its totient is φ = 12537388.

The previous prime is 12537353. The next prime is 12537403. The reversal of 12537389 is 98373521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12369289 + 168100 = 3517^2 + 410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12537389 is a prime.

It is a super-2 number, since 2×12537389² = 314372245874642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12537089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6268694 + 6268695.

It is an arithmetic number, because the mean of its divisors is an integer number (6268695).

Almost surely, 2^12537389 is an apocalyptic number.

It is an amenable number.

12537389 is a deficient number, since it is larger than the sum of its proper divisors (1).

12537389 is an equidigital number, since it uses as much as digits as its factorization.

12537389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 38.

The square root of 12537389 is about 3540.8175609596. The cubic root of 12537389 is about 232.3106038422.

The spelling of 12537389 in words is "twelve million, five hundred thirty-seven thousand, three hundred eighty-nine".