161795867 has 2 divisors, whose sum is σ = 161795868. Its totient is φ = 161795866.

The previous prime is 161795863. The next prime is 161795917. The reversal of 161795867 is 768597161.

It is an a-pointer prime, because the next prime (161795917) can be obtained adding 161795867 to its sum of digits (50).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161795867 - 2² = 161795863 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (161795863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80897933 + 80897934.

It is an arithmetic number, because the mean of its divisors is an integer number (80897934).

Almost surely, 2^161795867 is an apocalyptic number.

161795867 is a deficient number, since it is larger than the sum of its proper divisors (1).

161795867 is an equidigital number, since it uses as much as digits as its factorization.

161795867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 635040, while the sum is 50.

The square root of 161795867 is about 12719.9004320002. The cubic root of 161795867 is about 544.9071098315.

The spelling of 161795867 in words is "one hundred sixty-one million, seven hundred ninety-five thousand, eight hundred sixty-seven".