161795807 has 2 divisors, whose sum is σ = 161795808. Its totient is φ = 161795806.

The previous prime is 161795791. The next prime is 161795827. The reversal of 161795807 is 708597161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161795807 - 2⁴ = 161795791 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161795827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80897903 + 80897904.

It is an arithmetic number, because the mean of its divisors is an integer number (80897904).

Almost surely, 2^161795807 is an apocalyptic number.

161795807 is a deficient number, since it is larger than the sum of its proper divisors (1).

161795807 is an equidigital number, since it uses as much as digits as its factorization.

161795807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105840, while the sum is 44.

The square root of 161795807 is about 12719.8980734910. The cubic root of 161795807 is about 544.9070424741.

The spelling of 161795807 in words is "one hundred sixty-one million, seven hundred ninety-five thousand, eight hundred seven".