61223717 has 2 divisors, whose sum is σ = 61223718. Its totient is φ = 61223716.

The previous prime is 61223711. The next prime is 61223731. The reversal of 61223717 is 71732216.

61223717 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., 35832196 + 25391521 = 5986^2 + 5039^2 .

It is a cyclic number.

It is not a de Polignac number, because 61223717 - 2¹² = 61219621 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61223717.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61223711) 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, 30611858 + 30611859.

It is an arithmetic number, because the mean of its divisors is an integer number (30611859).

Almost surely, 2^61223717 is an apocalyptic number.

It is an amenable number.

61223717 is a deficient number, since it is larger than the sum of its proper divisors (1).

61223717 is an equidigital number, since it uses as much as digits as its factorization.

61223717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3528, while the sum is 29.

The square root of 61223717 is about 7824.5585817987. The cubic root of 61223717 is about 394.1303669017.

The spelling of 61223717 in words is "sixty-one million, two hundred twenty-three thousand, seven hundred seventeen".