165803799 has 32 divisors (see below), whose sum is σ = 259200000. Its totient is φ = 94235232.

The previous prime is 165803797. The next prime is 165803801. The reversal of 165803799 is 997308561.

It is an interprime number because it is at equal distance from previous prime (165803797) and next prime (165803801).

It is not a de Polignac number, because 165803799 - 2¹ = 165803797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165803797) 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 in 31 ways as a sum of consecutive naturals, for example, 276502 + ... + 277100.

It is an arithmetic number, because the mean of its divisors is an integer number (8100000).

Almost surely, 2^165803799 is an apocalyptic number.

165803799 is a deficient number, since it is larger than the sum of its proper divisors (93396201).

165803799 is an equidigital number, since it uses as much as digits as its factorization.

165803799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892 (or 878 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 48.

The square root of 165803799 is about 12876.4824000967. The cubic root of 165803799 is about 549.3698557193.

The spelling of 165803799 in words is "one hundred sixty-five million, eight hundred three thousand, seven hundred ninety-nine".