13625537 has 2 divisors, whose sum is σ = 13625538. Its totient is φ = 13625536.

The previous prime is 13625533. The next prime is 13625543. The reversal of 13625537 is 73552631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9480241 + 4145296 = 3079^2 + 2036^2 .

It is an emirp because it is prime and its reverse (73552631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13625537 - 2² = 13625533 is a prime.

It is not a weakly prime, because it can be changed into another prime (13625533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6812768 + 6812769.

It is an arithmetic number, because the mean of its divisors is an integer number (6812769).

Almost surely, 2^13625537 is an apocalyptic number.

It is an amenable number.

13625537 is a deficient number, since it is larger than the sum of its proper divisors (1).

13625537 is an equidigital number, since it uses as much as digits as its factorization.

13625537 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 13625537 is about 3691.2785048002. The cubic root of 13625537 is about 238.8459468353.

The spelling of 13625537 in words is "thirteen million, six hundred twenty-five thousand, five hundred thirty-seven".