171996967 has 4 divisors (see below), whose sum is σ = 179475120. Its totient is φ = 164518816.

The previous prime is 171996953. The next prime is 171996971. The reversal of 171996967 is 769699171.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-171996967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171996907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3739042 + ... + 3739087.

It is an arithmetic number, because the mean of its divisors is an integer number (44868780).

Almost surely, 2^171996967 is an apocalyptic number.

171996967 is a deficient number, since it is larger than the sum of its proper divisors (7478153).

171996967 is an equidigital number, since it uses as much as digits as its factorization.

171996967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7478152.

The product of its digits is 1285956, while the sum is 55.

The square root of 171996967 is about 13114.7614160533. The cubic root of 171996967 is about 556.1265077538.

The spelling of 171996967 in words is "one hundred seventy-one million, nine hundred ninety-six thousand, nine hundred sixty-seven".