160006991 has 2 divisors, whose sum is σ = 160006992. Its totient is φ = 160006990.

The previous prime is 160006963. The next prime is 160006993. The reversal of 160006991 is 199600061.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (199600061) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-160006991 is a prime.

It is a Sophie Germain prime.

Together with 160006993, 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 (160006993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80003495 + 80003496.

It is an arithmetic number, because the mean of its divisors is an integer number (80003496).

Almost surely, 2^160006991 is an apocalyptic number.

160006991 is a deficient number, since it is larger than the sum of its proper divisors (1).

160006991 is an equidigital number, since it uses as much as digits as its factorization.

160006991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 160006991 is about 12649.3869811940. The cubic root of 160006991 is about 542.8914300761.

The spelling of 160006991 in words is "one hundred sixty million, six thousand, nine hundred ninety-one".