172070617 has 8 divisors (see below), whose sum is σ = 182385000. Its totient is φ = 161777664.

The previous prime is 172070597. The next prime is 172070623. The reversal of 172070617 is 716070271.

It can be written as a sum of positive squares in 4 ways, for example, as 47279376 + 124791241 = 6876^2 + 11171^2 .

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 172070617 - 2¹⁹ = 171546329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172070687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13009 + ... + 22657.

It is an arithmetic number, because the mean of its divisors is an integer number (22798125).

Almost surely, 2^172070617 is an apocalyptic number.

172070617 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

172070617 is a deficient number, since it is larger than the sum of its proper divisors (10314383).

172070617 is a wasteful number, since it uses less digits than its factorization.

172070617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10715.

The product of its (nonzero) digits is 4116, while the sum is 31.

The square root of 172070617 is about 13117.5690202110. The cubic root of 172070617 is about 556.2058751852.

It can be divided in two parts, 17 and 2070617, that multiplied together give a square (35200489 = 5933²).

The spelling of 172070617 in words is "one hundred seventy-two million, seventy thousand, six hundred seventeen".