171420659 has 2 divisors, whose sum is σ = 171420660. Its totient is φ = 171420658.

The previous prime is 171420643. The next prime is 171420721. The reversal of 171420659 is 956024171.

It is a weak prime.

It is an emirp because it is prime and its reverse (956024171) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 171420659 - 2⁴ = 171420643 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (171420629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85710329 + 85710330.

It is an arithmetic number, because the mean of its divisors is an integer number (85710330).

Almost surely, 2^171420659 is an apocalyptic number.

171420659 is a deficient number, since it is larger than the sum of its proper divisors (1).

171420659 is an equidigital number, since it uses as much as digits as its factorization.

171420659 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 171420659 is about 13092.7712498157. The cubic root of 171420659 is about 555.5046774311.

The spelling of 171420659 in words is "one hundred seventy-one million, four hundred twenty thousand, six hundred fifty-nine".