159999811 has 2 divisors, whose sum is σ = 159999812. Its totient is φ = 159999810.

The previous prime is 159999793. The next prime is 159999871. The reversal of 159999811 is 118999951.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-159999811 is a prime.

It is not a weakly prime, because it can be changed into another prime (159999871) 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, 79999905 + 79999906.

It is an arithmetic number, because the mean of its divisors is an integer number (79999906).

Almost surely, 2^159999811 is an apocalyptic number.

159999811 is a deficient number, since it is larger than the sum of its proper divisors (1).

159999811 is an equidigital number, since it uses as much as digits as its factorization.

159999811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 262440, while the sum is 52.

The square root of 159999811 is about 12649.1031697903. The cubic root of 159999811 is about 542.8833095585.

The spelling of 159999811 in words is "one hundred fifty-nine million, nine hundred ninety-nine thousand, eight hundred eleven".