170408681 has 2 divisors, whose sum is σ = 170408682. Its totient is φ = 170408680.

The previous prime is 170408657. The next prime is 170408723. The reversal of 170408681 is 186804071.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115885225 + 54523456 = 10765^2 + 7384^2 .

It is an emirp because it is prime and its reverse (186804071) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-170408681 is a prime.

It is a super-2 number, since 2×170408681² = 58078237120319522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (170408281) 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, 85204340 + 85204341.

It is an arithmetic number, because the mean of its divisors is an integer number (85204341).

Almost surely, 2^170408681 is an apocalyptic number.

It is an amenable number.

170408681 is a deficient number, since it is larger than the sum of its proper divisors (1).

170408681 is an equidigital number, since it uses as much as digits as its factorization.

170408681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 170408681 is about 13054.0676036245. The cubic root of 170408681 is about 554.4093827950.

The spelling of 170408681 in words is "one hundred seventy million, four hundred eight thousand, six hundred eighty-one".