165135449 has 2 divisors, whose sum is σ = 165135450. Its totient is φ = 165135448.

The previous prime is 165135431. The next prime is 165135493. The reversal of 165135449 is 944531561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159845449 + 5290000 = 12643^2 + 2300^2 .

It is a cyclic number.

It is not a de Polignac number, because 165135449 - 2²⁴ = 148358233 is a prime.

It is not a weakly prime, because it can be changed into another prime (165135499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82567724 + 82567725.

It is an arithmetic number, because the mean of its divisors is an integer number (82567725).

Almost surely, 2^165135449 is an apocalyptic number.

It is an amenable number.

165135449 is a deficient number, since it is larger than the sum of its proper divisors (1).

165135449 is an equidigital number, since it uses as much as digits as its factorization.

165135449 is an odious number, because the sum of its binary digits is odd.

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

The square root of 165135449 is about 12850.5038422624. The cubic root of 165135449 is about 548.6306973381.

The spelling of 165135449 in words is "one hundred sixty-five million, one hundred thirty-five thousand, four hundred forty-nine".