165158369 has 2 divisors, whose sum is σ = 165158370. Its totient is φ = 165158368.

The previous prime is 165158353. The next prime is 165158387. The reversal of 165158369 is 963851561.

165158369 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120736144 + 44422225 = 10988^2 + 6665^2 .

It is a cyclic number.

It is not a de Polignac number, because 165158369 - 2⁴ = 165158353 is a prime.

It is a super-2 number, since 2×165158369² = 54554573701480322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (165158869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82579184 + 82579185.

It is an arithmetic number, because the mean of its divisors is an integer number (82579185).

Almost surely, 2^165158369 is an apocalyptic number.

It is an amenable number.

165158369 is a deficient number, since it is larger than the sum of its proper divisors (1).

165158369 is an equidigital number, since it uses as much as digits as its factorization.

165158369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 194400, while the sum is 44.

The square root of 165158369 is about 12851.3956051473. The cubic root of 165158369 is about 548.6560785911.

The spelling of 165158369 in words is "one hundred sixty-five million, one hundred fifty-eight thousand, three hundred sixty-nine".