170680649 has 2 divisors, whose sum is σ = 170680650. Its totient is φ = 170680648.

The previous prime is 170680621. The next prime is 170680661. The reversal of 170680649 is 946086071.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108160000 + 62520649 = 10400^2 + 7907^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-170680649 is a prime.

It is a super-2 number, since 2×170680649² = 58263767886122402, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (170680669) 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, 85340324 + 85340325.

It is an arithmetic number, because the mean of its divisors is an integer number (85340325).

Almost surely, 2^170680649 is an apocalyptic number.

It is an amenable number.

170680649 is a deficient number, since it is larger than the sum of its proper divisors (1).

170680649 is an equidigital number, since it uses as much as digits as its factorization.

170680649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 170680649 is about 13064.4804336032. The cubic root of 170680649 is about 554.7041672051.

The spelling of 170680649 in words is "one hundred seventy million, six hundred eighty thousand, six hundred forty-nine".