49109 has 2 divisors, whose sum is σ = 49110. Its totient is φ = 49108.

The previous prime is 49103. The next prime is 49117. The reversal of 49109 is 90194.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34225 + 14884 = 185^2 + 122^2 .

It is a cyclic number.

It is not a de Polignac number, because 49109 - 2¹² = 45013 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24554 + 24555.

It is an arithmetic number, because the mean of its divisors is an integer number (24555).

2⁴⁹¹⁰⁹ is an apocalyptic number.

It is an amenable number.

49109 is a deficient number, since it is larger than the sum of its proper divisors (1).

49109 is an equidigital number, since it uses as much as digits as its factorization.

49109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 49109 is about 221.6055053468. The cubic root of 49109 is about 36.6201706329.

The spelling of 49109 in words is "forty-nine thousand, one hundred nine".