49649839 has 2 divisors, whose sum is σ = 49649840. Its totient is φ = 49649838.

The previous prime is 49649833. The next prime is 49649849. The reversal of 49649839 is 93894694.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 49649839 - 2¹⁹ = 49125551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49649833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24824919 + 24824920.

It is an arithmetic number, because the mean of its divisors is an integer number (24824920).

Almost surely, 2^49649839 is an apocalyptic number.

49649839 is a deficient number, since it is larger than the sum of its proper divisors (1).

49649839 is an equidigital number, since it uses as much as digits as its factorization.

49649839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1679616, while the sum is 52.

The square root of 49649839 is about 7046.2641874968. The cubic root of 49649839 is about 367.5411316512.

The spelling of 49649839 in words is "forty-nine million, six hundred forty-nine thousand, eight hundred thirty-nine".