49661609 has 2 divisors, whose sum is σ = 49661610. Its totient is φ = 49661608.

The previous prime is 49661587. The next prime is 49661617. The reversal of 49661609 is 90616694.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49632025 + 29584 = 7045^2 + 172^2 .

It is a cyclic number.

It is not a de Polignac number, because 49661609 - 2²⁴ = 32884393 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (49661009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24830804 + 24830805.

It is an arithmetic number, because the mean of its divisors is an integer number (24830805).

Almost surely, 2^49661609 is an apocalyptic number.

It is an amenable number.

49661609 is a deficient number, since it is larger than the sum of its proper divisors (1).

49661609 is an equidigital number, since it uses as much as digits as its factorization.

49661609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 49661609 is about 7047.0993323494. The cubic root of 49661609 is about 367.5701724794.

The spelling of 49661609 in words is "forty-nine million, six hundred sixty-one thousand, six hundred nine".