61840717 has 2 divisors, whose sum is σ = 61840718. Its totient is φ = 61840716.

The previous prime is 61840711. The next prime is 61840729. The reversal of 61840717 is 71704816.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61246276 + 594441 = 7826^2 + 771^2 .

It is a cyclic number.

It is not a de Polignac number, because 61840717 - 2⁷ = 61840589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61840711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30920358 + 30920359.

It is an arithmetic number, because the mean of its divisors is an integer number (30920359).

Almost surely, 2^61840717 is an apocalyptic number.

It is an amenable number.

61840717 is a deficient number, since it is larger than the sum of its proper divisors (1).

61840717 is an equidigital number, since it uses as much as digits as its factorization.

61840717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 61840717 is about 7863.8868888101. The cubic root of 61840717 is about 395.4499322090.

The spelling of 61840717 in words is "sixty-one million, eight hundred forty thousand, seven hundred seventeen".