9125639 has 2 divisors, whose sum is σ = 9125640. Its totient is φ = 9125638.

The previous prime is 9125621. The next prime is 9125659. The reversal of 9125639 is 9365219.

It is a weak prime.

It is an emirp because it is prime and its reverse (9365219) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9125639 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 9125599 and 9125608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9125609) 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, 4562819 + 4562820.

It is an arithmetic number, because the mean of its divisors is an integer number (4562820).

Almost surely, 2^9125639 is an apocalyptic number.

9125639 is a deficient number, since it is larger than the sum of its proper divisors (1).

9125639 is an equidigital number, since it uses as much as digits as its factorization.

9125639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14580, while the sum is 35.

The square root of 9125639 is about 3020.8672595796. The cubic root of 9125639 is about 208.9718375093.

The spelling of 9125639 in words is "nine million, one hundred twenty-five thousand, six hundred thirty-nine".