4957639 has 2 divisors, whose sum is σ = 4957640. Its totient is φ = 4957638.

The previous prime is 4957633. The next prime is 4957663. The reversal of 4957639 is 9367594.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4957639 - 2¹³ = 4949447 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4957595 and 4957604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4957633) 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, 2478819 + 2478820.

It is an arithmetic number, because the mean of its divisors is an integer number (2478820).

Almost surely, 2^4957639 is an apocalyptic number.

4957639 is a deficient number, since it is larger than the sum of its proper divisors (1).

4957639 is an equidigital number, since it uses as much as digits as its factorization.

4957639 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 4957639 is about 2226.5756218912. The cubic root of 4957639 is about 170.5133158390.

The spelling of 4957639 in words is "four million, nine hundred fifty-seven thousand, six hundred thirty-nine".