161547017 has 2 divisors, whose sum is σ = 161547018. Its totient is φ = 161547016.

The previous prime is 161547013. The next prime is 161547019. The reversal of 161547017 is 710745161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148449856 + 13097161 = 12184^2 + 3619^2 .

It is a cyclic number.

It is not a de Polignac number, because 161547017 - 2² = 161547013 is a prime.

Together with 161547019, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (161547013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80773508 + 80773509.

It is an arithmetic number, because the mean of its divisors is an integer number (80773509).

Almost surely, 2^161547017 is an apocalyptic number.

It is an amenable number.

161547017 is a deficient number, since it is larger than the sum of its proper divisors (1).

161547017 is an equidigital number, since it uses as much as digits as its factorization.

161547017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5880, while the sum is 32.

The square root of 161547017 is about 12710.1147516456. The cubic root of 161547017 is about 544.6276018396.

The spelling of 161547017 in words is "one hundred sixty-one million, five hundred forty-seven thousand, seventeen".