171680137 has 2 divisors, whose sum is σ = 171680138. Its totient is φ = 171680136.

The previous prime is 171680107. The next prime is 171680141. The reversal of 171680137 is 731086171.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164583241 + 7096896 = 12829^2 + 2664^2 .

It is a cyclic number.

It is not a de Polignac number, because 171680137 - 2¹⁵ = 171647369 is a prime.

It is not a weakly prime, because it can be changed into another prime (171680107) 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 as a sum of consecutive naturals, namely, 85840068 + 85840069.

It is an arithmetic number, because the mean of its divisors is an integer number (85840069).

Almost surely, 2^171680137 is an apocalyptic number.

It is an amenable number.

171680137 is a deficient number, since it is larger than the sum of its proper divisors (1).

171680137 is an equidigital number, since it uses as much as digits as its factorization.

171680137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 171680137 is about 13102.6767112678. The cubic root of 171680137 is about 555.7848237024.

The spelling of 171680137 in words is "one hundred seventy-one million, six hundred eighty thousand, one hundred thirty-seven".