172143107 has 2 divisors, whose sum is σ = 172143108. Its totient is φ = 172143106.

The previous prime is 172143091. The next prime is 172143113. The reversal of 172143107 is 701341271.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 172143107 - 2⁴ = 172143091 is a prime.

It is a super-2 number, since 2×172143107² = 59266498575226898, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (172143197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86071553 + 86071554.

It is an arithmetic number, because the mean of its divisors is an integer number (86071554).

Almost surely, 2^172143107 is an apocalyptic number.

172143107 is a deficient number, since it is larger than the sum of its proper divisors (1).

172143107 is an equidigital number, since it uses as much as digits as its factorization.

172143107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 172143107 is about 13120.3318174503. The cubic root of 172143107 is about 556.2839704541.

Adding to 172143107 its reverse (701341271), we get a palindrome (873484378).

The spelling of 172143107 in words is "one hundred seventy-two million, one hundred forty-three thousand, one hundred seven".