61705217 has 8 divisors (see below), whose sum is σ = 74232000. Its totient is φ = 50106384.

The previous prime is 61705207. The next prime is 61705229. The reversal of 61705217 is 71250716.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61705217 - 2⁴ = 61705201 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61705217.

It is not an unprimeable number, because it can be changed into a prime (61705207) 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 in 7 ways as a sum of consecutive naturals, for example, 231842 + ... + 232107.

It is an arithmetic number, because the mean of its divisors is an integer number (9279000).

Almost surely, 2^61705217 is an apocalyptic number.

It is an amenable number.

61705217 is a deficient number, since it is larger than the sum of its proper divisors (12526783).

61705217 is a wasteful number, since it uses less digits than its factorization.

61705217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463975.

The product of its (nonzero) digits is 2940, while the sum is 29.

The square root of 61705217 is about 7855.2668318778. The cubic root of 61705217 is about 395.1608958376.

The spelling of 61705217 in words is "sixty-one million, seven hundred five thousand, two hundred seventeen".