49391 has 2 divisors, whose sum is σ = 49392. Its totient is φ = 49390.

The previous prime is 49369. The next prime is 49393. The reversal of 49391 is 19394.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49391 is a prime.

Together with 49393, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 12 and base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 49391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24695 + 24696.

It is an arithmetic number, because the mean of its divisors is an integer number (24696).

2⁴⁹³⁹¹ is an apocalyptic number.

49391 is a deficient number, since it is larger than the sum of its proper divisors (1).

49391 is an equidigital number, since it uses as much as digits as its factorization.

49391 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 49391 is about 222.2408603295. The cubic root of 49391 is about 36.6901319037.

The spelling of 49391 in words is "forty-nine thousand, three hundred ninety-one".