171660613 has 2 divisors, whose sum is σ = 171660614. Its totient is φ = 171660612.

The previous prime is 171660583. The next prime is 171660617. The reversal of 171660613 is 316066171.

171660613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 168948004 + 2712609 = 12998^2 + 1647^2 .

It is a cyclic number.

It is not a de Polignac number, because 171660613 - 2²¹ = 169563461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171660617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85830306 + 85830307.

It is an arithmetic number, because the mean of its divisors is an integer number (85830307).

Almost surely, 2^171660613 is an apocalyptic number.

It is an amenable number.

171660613 is a deficient number, since it is larger than the sum of its proper divisors (1).

171660613 is an equidigital number, since it uses as much as digits as its factorization.

171660613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 171660613 is about 13101.9316514780. The cubic root of 171660613 is about 555.7637543765.

The spelling of 171660613 in words is "one hundred seventy-one million, six hundred sixty thousand, six hundred thirteen".