172161767 has 2 divisors, whose sum is σ = 172161768. Its totient is φ = 172161766.

The previous prime is 172161751. The next prime is 172161797. The reversal of 172161767 is 767161271.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 172161767 - 2⁴ = 172161751 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 172161767.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172161707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86080883 + 86080884.

It is an arithmetic number, because the mean of its divisors is an integer number (86080884).

Almost surely, 2^172161767 is an apocalyptic number.

172161767 is a deficient number, since it is larger than the sum of its proper divisors (1).

172161767 is an equidigital number, since it uses as much as digits as its factorization.

172161767 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24696, while the sum is 38.

The square root of 172161767 is about 13121.0429082448. The cubic root of 172161767 is about 556.3040697851.

The spelling of 172161767 in words is "one hundred seventy-two million, one hundred sixty-one thousand, seven hundred sixty-seven".