4975639 has 2 divisors, whose sum is σ = 4975640. Its totient is φ = 4975638.

The previous prime is 4975631. The next prime is 4975643. The reversal of 4975639 is 9365794.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4975639 - 2³ = 4975631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4975595 and 4975604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4975631) 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, 2487819 + 2487820.

It is an arithmetic number, because the mean of its divisors is an integer number (2487820).

Almost surely, 2^4975639 is an apocalyptic number.

4975639 is a deficient number, since it is larger than the sum of its proper divisors (1).

4975639 is an equidigital number, since it uses as much as digits as its factorization.

4975639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 204120, while the sum is 43.

The square root of 4975639 is about 2230.6140410210. The cubic root of 4975639 is about 170.7194309273.

The spelling of 4975639 in words is "four million, nine hundred seventy-five thousand, six hundred thirty-nine".