161202917 has 2 divisors, whose sum is σ = 161202918. Its totient is φ = 161202916.

The previous prime is 161202911. The next prime is 161202971. The reversal of 161202917 is 719202161.

Together with next prime (161202971) 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., 109851361 + 51351556 = 10481^2 + 7166^2 .

It is an emirp because it is prime and its reverse (719202161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161202917 - 2¹⁰ = 161201893 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161202917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161202911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80601458 + 80601459.

It is an arithmetic number, because the mean of its divisors is an integer number (80601459).

Almost surely, 2^161202917 is an apocalyptic number.

It is an amenable number.

161202917 is a deficient number, since it is larger than the sum of its proper divisors (1).

161202917 is an equidigital number, since it uses as much as digits as its factorization.

161202917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 161202917 is about 12696.5710725377. The cubic root of 161202917 is about 544.2406359078.

The spelling of 161202917 in words is "one hundred sixty-one million, two hundred two thousand, nine hundred seventeen".