161712797 has 2 divisors, whose sum is σ = 161712798. Its totient is φ = 161712796.

The previous prime is 161712779. The next prime is 161712799. The reversal of 161712797 is 797217161.

161712797 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (161712779) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101324356 + 60388441 = 10066^2 + 7771^2 .

It is a cyclic number.

It is not a de Polignac number, because 161712797 - 2⁸ = 161712541 is a prime.

Together with 161712799, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161712799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80856398 + 80856399.

It is an arithmetic number, because the mean of its divisors is an integer number (80856399).

Almost surely, 2^161712797 is an apocalyptic number.

It is an amenable number.

161712797 is a deficient number, since it is larger than the sum of its proper divisors (1).

161712797 is an equidigital number, since it uses as much as digits as its factorization.

161712797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37044, while the sum is 41.

The square root of 161712797 is about 12716.6346570152. The cubic root of 161712797 is about 544.8138376042.

The spelling of 161712797 in words is "one hundred sixty-one million, seven hundred twelve thousand, seven hundred ninety-seven".