170641957 has 2 divisors, whose sum is σ = 170641958. Its totient is φ = 170641956.

The previous prime is 170641921. The next prime is 170641973. The reversal of 170641957 is 759146071.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154529761 + 16112196 = 12431^2 + 4014^2 .

It is a cyclic number.

It is not a de Polignac number, because 170641957 - 2¹⁹ = 170117669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (170641987) 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, 85320978 + 85320979.

It is an arithmetic number, because the mean of its divisors is an integer number (85320979).

Almost surely, 2^170641957 is an apocalyptic number.

It is an amenable number.

170641957 is a deficient number, since it is larger than the sum of its proper divisors (1).

170641957 is an equidigital number, since it uses as much as digits as its factorization.

170641957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52920, while the sum is 40.

The square root of 170641957 is about 13062.9995406874. Note that the first 3 decimals coincide. The cubic root of 170641957 is about 554.6622483041.

The spelling of 170641957 in words is "one hundred seventy million, six hundred forty-one thousand, nine hundred fifty-seven".