49686617 has 2 divisors, whose sum is σ = 49686618. Its totient is φ = 49686616.

The previous prime is 49686613. The next prime is 49686619. The reversal of 49686617 is 71668694.

It is a happy number.

49686617 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37687321 + 11999296 = 6139^2 + 3464^2 .

It is a cyclic number.

It is not a de Polignac number, because 49686617 - 2² = 49686613 is a prime.

Together with 49686619, 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 (49686613) 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, 24843308 + 24843309.

It is an arithmetic number, because the mean of its divisors is an integer number (24843309).

Almost surely, 2^49686617 is an apocalyptic number.

It is an amenable number.

49686617 is a deficient number, since it is larger than the sum of its proper divisors (1).

49686617 is an equidigital number, since it uses as much as digits as its factorization.

49686617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 47.

The square root of 49686617 is about 7048.8734560921. The cubic root of 49686617 is about 367.6318609917.

The spelling of 49686617 in words is "forty-nine million, six hundred eighty-six thousand, six hundred seventeen".