167172217 has 4 divisors (see below), whose sum is σ = 168106320. Its totient is φ = 166238116.

The previous prime is 167172197. The next prime is 167172281. The reversal of 167172217 is 712271761.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 712271761 = 881 ⋅808481.

It is a cyclic number.

It is not a de Polignac number, because 167172217 - 2¹¹ = 167170169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (167572217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 466783 + ... + 467140.

It is an arithmetic number, because the mean of its divisors is an integer number (42026580).

Almost surely, 2^167172217 is an apocalyptic number.

It is an amenable number.

167172217 is a deficient number, since it is larger than the sum of its proper divisors (934103).

167172217 is an equidigital number, since it uses as much as digits as its factorization.

167172217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934102.

The product of its digits is 8232, while the sum is 34.

The square root of 167172217 is about 12929.5095421288. The cubic root of 167172217 is about 550.8770766288.

The spelling of 167172217 in words is "one hundred sixty-seven million, one hundred seventy-two thousand, two hundred seventeen".