165408469 has 2 divisors, whose sum is σ = 165408470. Its totient is φ = 165408468.

The previous prime is 165408409. The next prime is 165408497. The reversal of 165408469 is 964804561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 162562500 + 2845969 = 12750^2 + 1687^2 .

It is a cyclic number.

It is not a de Polignac number, because 165408469 - 2¹⁷ = 165277397 is a prime.

It is a super-2 number, since 2×165408469² = 54719923233847922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165408409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82704234 + 82704235.

It is an arithmetic number, because the mean of its divisors is an integer number (82704235).

Almost surely, 2^165408469 is an apocalyptic number.

It is an amenable number.

165408469 is a deficient number, since it is larger than the sum of its proper divisors (1).

165408469 is an equidigital number, since it uses as much as digits as its factorization.

165408469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 165408469 is about 12861.1223849243. The cubic root of 165408469 is about 548.9328829710.

The spelling of 165408469 in words is "one hundred sixty-five million, four hundred eight thousand, four hundred sixty-nine".