172143377 has 16 divisors (see below), whose sum is σ = 209848320. Its totient is φ = 137845248.

The previous prime is 172143353. The next prime is 172143421. The reversal of 172143377 is 773341271.

It is not a de Polignac number, because 172143377 - 2²⁰ = 171094801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172143337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11024 + ... + 21582.

It is an arithmetic number, because the mean of its divisors is an integer number (13115520).

Almost surely, 2^172143377 is an apocalyptic number.

172143377 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

172143377 is a deficient number, since it is larger than the sum of its proper divisors (37704943).

172143377 is a wasteful number, since it uses less digits than its factorization.

172143377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10720.

The product of its digits is 24696, while the sum is 35.

The square root of 172143377 is about 13120.3421068202. The cubic root of 172143377 is about 556.2842612908.

The spelling of 172143377 in words is "one hundred seventy-two million, one hundred forty-three thousand, three hundred seventy-seven".