172970605 has 8 divisors (see below), whose sum is σ = 207675000. Its totient is φ = 138302976.

The previous prime is 172970593. The next prime is 172970647. The reversal of 172970605 is 506079271.

It can be written as a sum of positive squares in 4 ways, for example, as 9872164 + 163098441 = 3142^2 + 12771^2 .

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 172970605 - 2⁵ = 172970573 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2521 + ... + 18769.

It is an arithmetic number, because the mean of its divisors is an integer number (25959375).

Almost surely, 2^172970605 is an apocalyptic number.

It is an amenable number.

172970605 is a deficient number, since it is larger than the sum of its proper divisors (34704395).

172970605 is a wasteful number, since it uses less digits than its factorization.

172970605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18383.

The product of its (nonzero) digits is 26460, while the sum is 37.

The square root of 172970605 is about 13151.8289602625. The cubic root of 172970605 is about 557.1739048945.

The spelling of 172970605 in words is "one hundred seventy-two million, nine hundred seventy thousand, six hundred five".