49409 has 2 divisors, whose sum is σ = 49410. Its totient is φ = 49408.

The previous prime is 49393. The next prime is 49411. The reversal of 49409 is 90494.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40000 + 9409 = 200^2 + 97^2 .

It is a cyclic number.

It is not a de Polignac number, because 49409 - 2⁴ = 49393 is a prime.

Together with 49411, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (49429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24704 + 24705.

It is an arithmetic number, because the mean of its divisors is an integer number (24705).

It is a Proth number, since it is equal to 193 ⋅ 2⁸ + 1 and 193 < 2⁸.

2⁴⁹⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

49409 is a deficient number, since it is larger than the sum of its proper divisors (1).

49409 is an equidigital number, since it uses as much as digits as its factorization.

49409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 49409 is about 222.2813532440. The cubic root of 49409 is about 36.6945884658.

Adding to 49409 its product of nonzero digits (1296), we get a palindrome (50705).

It can be divided in two parts, 4 and 9409, that multiplied together give a square (37636 = 194²).

The spelling of 49409 in words is "forty-nine thousand, four hundred nine".