165604499 has 2 divisors, whose sum is σ = 165604500. Its totient is φ = 165604498.

The previous prime is 165604493. The next prime is 165604501. The reversal of 165604499 is 994406561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165604499 - 2¹² = 165600403 is a prime.

Together with 165604501, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (165604493) 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, 82802249 + 82802250.

It is an arithmetic number, because the mean of its divisors is an integer number (82802250).

Almost surely, 2^165604499 is an apocalyptic number.

165604499 is a deficient number, since it is larger than the sum of its proper divisors (1).

165604499 is an equidigital number, since it uses as much as digits as its factorization.

165604499 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 165604499 is about 12868.7411583262. The cubic root of 165604499 is about 549.1496490416.

The spelling of 165604499 in words is "one hundred sixty-five million, six hundred four thousand, four hundred ninety-nine".