61712117 has 2 divisors, whose sum is σ = 61712118. Its totient is φ = 61712116.

The previous prime is 61712113. The next prime is 61712129. The reversal of 61712117 is 71121716.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52867441 + 8844676 = 7271^2 + 2974^2 .

It is a cyclic number.

It is not a de Polignac number, because 61712117 - 2² = 61712113 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61712113) 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, 30856058 + 30856059.

It is an arithmetic number, because the mean of its divisors is an integer number (30856059).

Almost surely, 2^61712117 is an apocalyptic number.

It is an amenable number.

61712117 is a deficient number, since it is larger than the sum of its proper divisors (1).

61712117 is an equidigital number, since it uses as much as digits as its factorization.

61712117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 588, while the sum is 26.

The square root of 61712117 is about 7855.7060153751. The cubic root of 61712117 is about 395.1756245142.

The spelling of 61712117 in words is "sixty-one million, seven hundred twelve thousand, one hundred seventeen".