12533657 has 2 divisors, whose sum is σ = 12533658. Its totient is φ = 12533656.

The previous prime is 12533629. The next prime is 12533663. The reversal of 12533657 is 75633521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11999296 + 534361 = 3464^2 + 731^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12533657 is a prime.

It is not a weakly prime, because it can be changed into another prime (12533957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6266828 + 6266829.

It is an arithmetic number, because the mean of its divisors is an integer number (6266829).

Almost surely, 2^12533657 is an apocalyptic number.

It is an amenable number.

12533657 is a deficient number, since it is larger than the sum of its proper divisors (1).

12533657 is an equidigital number, since it uses as much as digits as its factorization.

12533657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18900, while the sum is 32.

The square root of 12533657 is about 3540.2905248016. The cubic root of 12533657 is about 232.2875509505.

The spelling of 12533657 in words is "twelve million, five hundred thirty-three thousand, six hundred fifty-seven".