172809063 has 48 divisors (see below), whose sum is σ = 303600960. Its totient is φ = 92464128.

The previous prime is 172809061. The next prime is 172809067. The reversal of 172809063 is 360908271.

It is not a de Polignac number, because 172809063 - 2¹ = 172809061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172809061) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 339253 + ... + 339761.

It is an arithmetic number, because the mean of its divisors is an integer number (6325020).

Almost surely, 2^172809063 is an apocalyptic number.

172809063 is a deficient number, since it is larger than the sum of its proper divisors (130791897).

172809063 is a wasteful number, since it uses less digits than its factorization.

172809063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856 (or 853 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 172809063 is about 13145.6860984887. The cubic root of 172809063 is about 557.0003975299. Note that the first 3 decimals are identical.

The spelling of 172809063 in words is "one hundred seventy-two million, eight hundred nine thousand, sixty-three".