171151091 has 2 divisors, whose sum is σ = 171151092. Its totient is φ = 171151090.

The previous prime is 171151081. The next prime is 171151129. The reversal of 171151091 is 190151171.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 171151091 - 2²² = 166956787 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 171151091.

It is not a weakly prime, because it can be changed into another prime (171151021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85575545 + 85575546.

It is an arithmetic number, because the mean of its divisors is an integer number (85575546).

Almost surely, 2^171151091 is an apocalyptic number.

171151091 is a deficient number, since it is larger than the sum of its proper divisors (1).

171151091 is an equidigital number, since it uses as much as digits as its factorization.

171151091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 315, while the sum is 26.

The square root of 171151091 is about 13082.4726638354. The cubic root of 171151091 is about 555.2133378904.

The spelling of 171151091 in words is "one hundred seventy-one million, one hundred fifty-one thousand, ninety-one".