170720061 has 8 divisors (see below), whose sum is σ = 229641600. Its totient is φ = 112805952.

The previous prime is 170720059. The next prime is 170720083. The reversal of 170720061 is 160027071.

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

It is not a de Polignac number, because 170720061 - 2¹ = 170720059 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (170720461) 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 7 ways as a sum of consecutive naturals, for example, 251461 + ... + 252138.

It is an arithmetic number, because the mean of its divisors is an integer number (28705200).

Almost surely, 2^170720061 is an apocalyptic number.

It is an amenable number.

170720061 is a deficient number, since it is larger than the sum of its proper divisors (58921539).

170720061 is a wasteful number, since it uses less digits than its factorization.

170720061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503715.

The product of its (nonzero) digits is 588, while the sum is 24.

The square root of 170720061 is about 13065.9887111539. The cubic root of 170720061 is about 554.7468596412.

The spelling of 170720061 in words is "one hundred seventy million, seven hundred twenty thousand, sixty-one".