165915443 has 2 divisors, whose sum is σ = 165915444. Its totient is φ = 165915442.

The previous prime is 165915413. The next prime is 165915487. The reversal of 165915443 is 344519561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165915443 - 2⁸ = 165915187 is a prime.

It is a Sophie Germain prime.

It is equal to p_9287147 and since 165915443 and 9287147 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 165915397 and 165915406.

It is not a weakly prime, because it can be changed into another prime (165915403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82957721 + 82957722.

It is an arithmetic number, because the mean of its divisors is an integer number (82957722).

Almost surely, 2^165915443 is an apocalyptic number.

165915443 is a deficient number, since it is larger than the sum of its proper divisors (1).

165915443 is an equidigital number, since it uses as much as digits as its factorization.

165915443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 38.

The square root of 165915443 is about 12880.8168607430. The cubic root of 165915443 is about 549.4931341309.

The spelling of 165915443 in words is "one hundred sixty-five million, nine hundred fifteen thousand, four hundred forty-three".