161061671 has 2 divisors, whose sum is σ = 161061672. Its totient is φ = 161061670.

The previous prime is 161061661. The next prime is 161061673. The reversal of 161061671 is 176160161.

It is a strong prime.

It is an emirp because it is prime and its reverse (176160161) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161061671 is a prime.

It is a Sophie Germain prime.

Together with 161061673, 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 (161061673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80530835 + 80530836.

It is an arithmetic number, because the mean of its divisors is an integer number (80530836).

Almost surely, 2^161061671 is an apocalyptic number.

161061671 is a deficient number, since it is larger than the sum of its proper divisors (1).

161061671 is an equidigital number, since it uses as much as digits as its factorization.

161061671 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 161061671 is about 12691.0074856175. The cubic root of 161061671 is about 544.0816349069.

The spelling of 161061671 in words is "one hundred sixty-one million, sixty-one thousand, six hundred seventy-one".