49666289 has 2 divisors, whose sum is σ = 49666290. Its totient is φ = 49666288.

The previous prime is 49666237. The next prime is 49666307. The reversal of 49666289 is 98266694.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43824400 + 5841889 = 6620^2 + 2417^2 .

It is a cyclic number.

It is not a de Polignac number, because 49666289 - 2⁸ = 49666033 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (49666189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24833144 + 24833145.

It is an arithmetic number, because the mean of its divisors is an integer number (24833145).

Almost surely, 2^49666289 is an apocalyptic number.

It is an amenable number.

49666289 is a deficient number, since it is larger than the sum of its proper divisors (1).

49666289 is an equidigital number, since it uses as much as digits as its factorization.

49666289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1119744, while the sum is 50.

The square root of 49666289 is about 7047.4313760405. The cubic root of 49666289 is about 367.5817184496.

The spelling of 49666289 in words is "forty-nine million, six hundred sixty-six thousand, two hundred eighty-nine".