61444709 has 2 divisors, whose sum is σ = 61444710. Its totient is φ = 61444708.

The previous prime is 61444703. The next prime is 61444723. The reversal of 61444709 is 90744416.

61444709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57532225 + 3912484 = 7585^2 + 1978^2 .

It is a cyclic number.

It is not a de Polignac number, because 61444709 - 2⁴ = 61444693 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61444703) 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, 30722354 + 30722355.

It is an arithmetic number, because the mean of its divisors is an integer number (30722355).

Almost surely, 2^61444709 is an apocalyptic number.

It is an amenable number.

61444709 is a deficient number, since it is larger than the sum of its proper divisors (1).

61444709 is an equidigital number, since it uses as much as digits as its factorization.

61444709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 61444709 is about 7838.6675525883. The cubic root of 61444709 is about 394.6040127054.

The spelling of 61444709 in words is "sixty-one million, four hundred forty-four thousand, seven hundred nine".