172980785 has 8 divisors (see below), whose sum is σ = 207700416. Its totient is φ = 138302320.

The previous prime is 172980757. The next prime is 172980793. The reversal of 172980785 is 587089271.

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

It is not a de Polignac number, because 172980785 - 2¹⁴ = 172964401 is a prime.

It is a super-3 number, since 3×172980785³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian 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, 131 + ... + 18600.

It is an arithmetic number, because the mean of its divisors is an integer number (25962552).

Almost surely, 2^172980785 is an apocalyptic number.

It is an amenable number.

172980785 is a deficient number, since it is larger than the sum of its proper divisors (34719631).

172980785 is a wasteful number, since it uses less digits than its factorization.

172980785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20583.

The product of its (nonzero) digits is 282240, while the sum is 47.

The square root of 172980785 is about 13152.2159729834. The cubic root of 172980785 is about 557.1848353049.

The spelling of 172980785 in words is "one hundred seventy-two million, nine hundred eighty thousand, seven hundred eighty-five".