171025949 has 2 divisors, whose sum is σ = 171025950. Its totient is φ = 171025948.

The previous prime is 171025937. The next prime is 171025979. The reversal of 171025949 is 949520171.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116532025 + 54493924 = 10795^2 + 7382^2 .

It is a cyclic number.

It is not a de Polignac number, because 171025949 - 2²⁴ = 154248733 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171025919) 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, 85512974 + 85512975.

It is an arithmetic number, because the mean of its divisors is an integer number (85512975).

Almost surely, 2^171025949 is an apocalyptic number.

It is an amenable number.

171025949 is a deficient number, since it is larger than the sum of its proper divisors (1).

171025949 is an equidigital number, since it uses as much as digits as its factorization.

171025949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 171025949 is about 13077.6889777973. The cubic root of 171025949 is about 555.0779848752.

The spelling of 171025949 in words is "one hundred seventy-one million, twenty-five thousand, nine hundred forty-nine".