159997769 has 2 divisors, whose sum is σ = 159997770. Its totient is φ = 159997768.

The previous prime is 159997753. The next prime is 159997771. The reversal of 159997769 is 967799951.

159997769 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92544400 + 67453369 = 9620^2 + 8213^2 .

It is a cyclic number.

It is not a de Polignac number, because 159997769 - 2⁴ = 159997753 is a prime.

It is a super-2 number, since 2×159997769² = 51198572169954722, which contains 22 as substring.

Together with 159997771, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (159997709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79998884 + 79998885.

It is an arithmetic number, because the mean of its divisors is an integer number (79998885).

Almost surely, 2^159997769 is an apocalyptic number.

It is an amenable number.

159997769 is a deficient number, since it is larger than the sum of its proper divisors (1).

159997769 is an equidigital number, since it uses as much as digits as its factorization.

159997769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9644670, while the sum is 62.

The square root of 159997769 is about 12649.0224523478. The cubic root of 159997769 is about 542.8810000299.

The spelling of 159997769 in words is "one hundred fifty-nine million, nine hundred ninety-seven thousand, seven hundred sixty-nine".