165654449 has 2 divisors, whose sum is σ = 165654450. Its totient is φ = 165654448.

The previous prime is 165654403. The next prime is 165654479. The reversal of 165654449 is 944456561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118113424 + 47541025 = 10868^2 + 6895^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165654449 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (165654479) 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, 82827224 + 82827225.

It is an arithmetic number, because the mean of its divisors is an integer number (82827225).

Almost surely, 2^165654449 is an apocalyptic number.

It is an amenable number.

165654449 is a deficient number, since it is larger than the sum of its proper divisors (1).

165654449 is an equidigital number, since it uses as much as digits as its factorization.

165654449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 518400, while the sum is 44.

The square root of 165654449 is about 12870.6817612743. The cubic root of 165654449 is about 549.2048554073.

The spelling of 165654449 in words is "one hundred sixty-five million, six hundred fifty-four thousand, four hundred forty-nine".