171676139 has 2 divisors, whose sum is σ = 171676140. Its totient is φ = 171676138.

The previous prime is 171676123. The next prime is 171676223. The reversal of 171676139 is 931676171.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (931676171) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 171676139 - 2⁴ = 171676123 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 171676096 and 171676105.

It is not a weakly prime, because it can be changed into another prime (171670139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85838069 + 85838070.

It is an arithmetic number, because the mean of its divisors is an integer number (85838070).

Almost surely, 2^171676139 is an apocalyptic number.

171676139 is a deficient number, since it is larger than the sum of its proper divisors (1).

171676139 is an equidigital number, since it uses as much as digits as its factorization.

171676139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47628, while the sum is 41.

The square root of 171676139 is about 13102.5241461331. The cubic root of 171676139 is about 555.7805093905.

The spelling of 171676139 in words is "one hundred seventy-one million, six hundred seventy-six thousand, one hundred thirty-nine".