61171717 has 2 divisors, whose sum is σ = 61171718. Its totient is φ = 61171716.

The previous prime is 61171679. The next prime is 61171727. The reversal of 61171717 is 71717116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39325441 + 21846276 = 6271^2 + 4674^2 .

It is a cyclic number.

It is not a de Polignac number, because 61171717 - 2¹⁵ = 61138949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61171727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30585858 + 30585859.

It is an arithmetic number, because the mean of its divisors is an integer number (30585859).

Almost surely, 2^61171717 is an apocalyptic number.

It is an amenable number.

61171717 is a deficient number, since it is larger than the sum of its proper divisors (1).

61171717 is an equidigital number, since it uses as much as digits as its factorization.

61171717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2058, while the sum is 31.

The square root of 61171717 is about 7821.2350047803. The cubic root of 61171717 is about 394.0187512012.

The spelling of 61171717 in words is "sixty-one million, one hundred seventy-one thousand, seven hundred seventeen".