49639 has 2 divisors, whose sum is σ = 49640. Its totient is φ = 49638.

The previous prime is 49633. The next prime is 49663. The reversal of 49639 is 93694.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 49639 - 2¹¹ = 47591 is a prime.

It is a Chen prime.

It is a nialpdrome in base 15.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 49639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24819 + 24820.

It is an arithmetic number, because the mean of its divisors is an integer number (24820).

2⁴⁹⁶³⁹ is an apocalyptic number.

49639 is a deficient number, since it is larger than the sum of its proper divisors (1).

49639 is an equidigital number, since it uses as much as digits as its factorization.

49639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5832, while the sum is 31.

The square root of 49639 is about 222.7981148933. The cubic root of 49639 is about 36.7514383876.

It can be divided in two parts, 496 and 39, that added together give a palindrome (535).

The spelling of 49639 in words is "forty-nine thousand, six hundred thirty-nine".