172134071 has 2 divisors, whose sum is σ = 172134072. Its totient is φ = 172134070.

The previous prime is 172134049. The next prime is 172134107. The reversal of 172134071 is 170431271.

It is a happy number.

172134071 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (172134107) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172134071 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 172134071.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172134671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86067035 + 86067036.

It is an arithmetic number, because the mean of its divisors is an integer number (86067036).

Almost surely, 2^172134071 is an apocalyptic number.

172134071 is a deficient number, since it is larger than the sum of its proper divisors (1).

172134071 is an equidigital number, since it uses as much as digits as its factorization.

172134071 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 172134071 is about 13119.9874618843. The cubic root of 172134071 is about 556.2742369442.

The spelling of 172134071 in words is "one hundred seventy-two million, one hundred thirty-four thousand, seventy-one".