171091013 has 2 divisors, whose sum is σ = 171091014. Its totient is φ = 171091012.

The previous prime is 171090979. The next prime is 171091027. The reversal of 171091013 is 310190171.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149866564 + 21224449 = 12242^2 + 4607^2 .

It is a cyclic number.

It is not a de Polignac number, because 171091013 - 2⁶ = 171090949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 171091013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171091033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85545506 + 85545507.

It is an arithmetic number, because the mean of its divisors is an integer number (85545507).

Almost surely, 2^171091013 is an apocalyptic number.

It is an amenable number.

171091013 is a deficient number, since it is larger than the sum of its proper divisors (1).

171091013 is an equidigital number, since it uses as much as digits as its factorization.

171091013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 189, while the sum is 23.

The square root of 171091013 is about 13080.1763367319. The cubic root of 171091013 is about 555.1483660373.

The spelling of 171091013 in words is "one hundred seventy-one million, ninety-one thousand, thirteen".