49871617 has 2 divisors, whose sum is σ = 49871618. Its totient is φ = 49871616.

The previous prime is 49871603. The next prime is 49871663. The reversal of 49871617 is 71617894.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49575681 + 295936 = 7041^2 + 544^2 .

It is a cyclic number.

It is not a de Polignac number, because 49871617 - 2¹¹ = 49869569 is a prime.

It is equal to p_2993875 and since 49871617 and 2993875 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (49871687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24935808 + 24935809.

It is an arithmetic number, because the mean of its divisors is an integer number (24935809).

Almost surely, 2^49871617 is an apocalyptic number.

It is an amenable number.

49871617 is a deficient number, since it is larger than the sum of its proper divisors (1).

49871617 is an equidigital number, since it uses as much as digits as its factorization.

49871617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 43.

The square root of 49871617 is about 7061.9839280474. The cubic root of 49871617 is about 368.0875682637.

The spelling of 49871617 in words is "forty-nine million, eight hundred seventy-one thousand, six hundred seventeen".