161017061 has 2 divisors, whose sum is σ = 161017062. Its totient is φ = 161017060.

The previous prime is 161017037. The next prime is 161017063. The reversal of 161017061 is 160710161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127260961 + 33756100 = 11281^2 + 5810^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161017061 is a prime.

It is a Sophie Germain prime.

Together with 161017063, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161017063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80508530 + 80508531.

It is an arithmetic number, because the mean of its divisors is an integer number (80508531).

Almost surely, 2^161017061 is an apocalyptic number.

It is an amenable number.

161017061 is a deficient number, since it is larger than the sum of its proper divisors (1).

161017061 is an equidigital number, since it uses as much as digits as its factorization.

161017061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 23.

The square root of 161017061 is about 12689.2498202218. The cubic root of 161017061 is about 544.0313979949.

The spelling of 161017061 in words is "one hundred sixty-one million, seventeen thousand, sixty-one".