49661617 has 2 divisors, whose sum is σ = 49661618. Its totient is φ = 49661616.

The previous prime is 49661609. The next prime is 49661663. The reversal of 49661617 is 71616694.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49617936 + 43681 = 7044^2 + 209^2 .

It is a cyclic number.

It is not a de Polignac number, because 49661617 - 2³ = 49661609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 49661617.

It is not a weakly prime, because it can be changed into another prime (49661917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24830808 + 24830809.

It is an arithmetic number, because the mean of its divisors is an integer number (24830809).

Almost surely, 2^49661617 is an apocalyptic number.

It is an amenable number.

49661617 is a deficient number, since it is larger than the sum of its proper divisors (1).

49661617 is an equidigital number, since it uses as much as digits as its factorization.

49661617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 40.

The square root of 49661617 is about 7047.0998999588. The cubic root of 49661617 is about 367.5701922167.

The spelling of 49661617 in words is "forty-nine million, six hundred sixty-one thousand, six hundred seventeen".