961722085 has 4 divisors (see below), whose sum is σ = 1154066508. Its totient is φ = 769377664.

The previous prime is 961722067. The next prime is 961722089. The reversal of 961722085 is 580227169.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 580227169 = 67 ⋅8660107.

It can be written as a sum of positive squares in 2 ways, for example, as 660387204 + 301334881 = 25698^2 + 17359^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-961722085 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (961722089) 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 in 3 ways as a sum of consecutive naturals, for example, 96172204 + ... + 96172213.

It is an arithmetic number, because the mean of its divisors is an integer number (288516627).

Almost surely, 2^961722085 is an apocalyptic number.

It is an amenable number.

961722085 is a deficient number, since it is larger than the sum of its proper divisors (192344423).

961722085 is a wasteful number, since it uses less digits than its factorization.

961722085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192344422.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 961722085 is about 31011.6443453100. The cubic root of 961722085 is about 987.0743422120.

The spelling of 961722085 in words is "nine hundred sixty-one million, seven hundred twenty-two thousand, eighty-five".