170722061 has 2 divisors, whose sum is σ = 170722062. Its totient is φ = 170722060.

The previous prime is 170722039. The next prime is 170722067. The reversal of 170722061 is 160227071.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134119561 + 36602500 = 11581^2 + 6050^2 .

It is an emirp because it is prime and its reverse (160227071) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-170722061 is a prime.

It is a super-2 number, since 2×170722061² = 58292044224175442, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 170722061.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (170722067) 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, 85361030 + 85361031.

It is an arithmetic number, because the mean of its divisors is an integer number (85361031).

Almost surely, 2^170722061 is an apocalyptic number.

It is an amenable number.

170722061 is a deficient number, since it is larger than the sum of its proper divisors (1).

170722061 is an equidigital number, since it uses as much as digits as its factorization.

170722061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 170722061 is about 13066.0652455129. The cubic root of 170722061 is about 554.7490259349.

The spelling of 170722061 in words is "one hundred seventy million, seven hundred twenty-two thousand, sixty-one".