172063643 has 4 divisors (see below), whose sum is σ = 173319720. Its totient is φ = 170807568.

The previous prime is 172063627. The next prime is 172063657. The reversal of 172063643 is 346360271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346360271 = 5741 ⋅60331.

It is a cyclic number.

It is not a de Polignac number, because 172063643 - 2⁴ = 172063627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172063603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 627833 + ... + 628106.

It is an arithmetic number, because the mean of its divisors is an integer number (43329930).

Almost surely, 2^172063643 is an apocalyptic number.

172063643 is a deficient number, since it is larger than the sum of its proper divisors (1256077).

172063643 is a wasteful number, since it uses less digits than its factorization.

172063643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256076.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 172063643 is about 13117.3031908239. The cubic root of 172063643 is about 556.1983607661.

The spelling of 172063643 in words is "one hundred seventy-two million, sixty-three thousand, six hundred forty-three".