172073505 has 8 divisors (see below), whose sum is σ = 275317632. Its totient is φ = 91772528.

The previous prime is 172073477. The next prime is 172073527. The reversal of 172073505 is 505370271.

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 172073505 - 2¹² = 172069409 is a prime.

It is a super-2 number, since 2×172073505² = 59218582245970050, which contains 22 as substring.

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, 5735769 + ... + 5735798.

It is an arithmetic number, because the mean of its divisors is an integer number (34414704).

Almost surely, 2^172073505 is an apocalyptic number.

172073505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

172073505 is a deficient number, since it is larger than the sum of its proper divisors (103244127).

172073505 is a wasteful number, since it uses less digits than its factorization.

172073505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11471575.

The product of its (nonzero) digits is 7350, while the sum is 30.

The square root of 172073505 is about 13117.6791011215. The cubic root of 172073505 is about 556.2089869185.

It can be divided in two parts, 172073 and 505, that added together give a triangular number (172578 = T₅₈₇).

The spelling of 172073505 in words is "one hundred seventy-two million, seventy-three thousand, five hundred five".