49139 has 2 divisors, whose sum is σ = 49140. Its totient is φ = 49138.

The previous prime is 49123. The next prime is 49157. The reversal of 49139 is 93194.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 49139 - 2⁴ = 49123 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (49109) 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, 24569 + 24570.

It is an arithmetic number, because the mean of its divisors is an integer number (24570).

2⁴⁹¹³⁹ is an apocalyptic number.

49139 is a deficient number, since it is larger than the sum of its proper divisors (1).

49139 is an equidigital number, since it uses as much as digits as its factorization.

49139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 972, while the sum is 26.

The square root of 49139 is about 221.6731828616. The cubic root of 49139 is about 36.6276260314.

The spelling of 49139 in words is "forty-nine thousand, one hundred thirty-nine".