165343949 has 2 divisors, whose sum is σ = 165343950. Its totient is φ = 165343948.

The previous prime is 165343931. The next prime is 165343963. The reversal of 165343949 is 949343561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 163072900 + 2271049 = 12770^2 + 1507^2 .

It is a cyclic number.

It is not a de Polignac number, because 165343949 - 2¹⁶ = 165278413 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 (165343349) 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, 82671974 + 82671975.

It is an arithmetic number, because the mean of its divisors is an integer number (82671975).

Almost surely, 2^165343949 is an apocalyptic number.

It is an amenable number.

165343949 is a deficient number, since it is larger than the sum of its proper divisors (1).

165343949 is an equidigital number, since it uses as much as digits as its factorization.

165343949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 349920, while the sum is 44.

The square root of 165343949 is about 12858.6138055391. The cubic root of 165343949 is about 548.8615005809.

The spelling of 165343949 in words is "one hundred sixty-five million, three hundred forty-three thousand, nine hundred forty-nine".