161417617 has 2 divisors, whose sum is σ = 161417618. Its totient is φ = 161417616.

The previous prime is 161417593. The next prime is 161417671. The reversal of 161417617 is 716714161.

It is a happy number.

Together with next prime (161417671) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 158860816 + 2556801 = 12604^2 + 1599^2 .

It is a cyclic number.

It is not a de Polignac number, because 161417617 - 2²⁷ = 27199889 is a prime.

It is not a weakly prime, because it can be changed into another prime (161417677) 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, 80708808 + 80708809.

It is an arithmetic number, because the mean of its divisors is an integer number (80708809).

Almost surely, 2^161417617 is an apocalyptic number.

It is an amenable number.

161417617 is a deficient number, since it is larger than the sum of its proper divisors (1).

161417617 is an equidigital number, since it uses as much as digits as its factorization.

161417617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7056, while the sum is 34.

The square root of 161417617 is about 12705.0232978928. The cubic root of 161417617 is about 544.4821464829.

The spelling of 161417617 in words is "one hundred sixty-one million, four hundred seventeen thousand, six hundred seventeen".