165508099 has 2 divisors, whose sum is σ = 165508100. Its totient is φ = 165508098.

The previous prime is 165508087. The next prime is 165508111. The reversal of 165508099 is 990805561.

It is a happy number.

165508099 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (165508087) and next prime (165508111).

It is a cyclic number.

It is not a de Polignac number, because 165508099 - 2¹³ = 165499907 is a prime.

It is not a weakly prime, because it can be changed into another prime (165508199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82754049 + 82754050.

It is an arithmetic number, because the mean of its divisors is an integer number (82754050).

Almost surely, 2^165508099 is an apocalyptic number.

165508099 is a deficient number, since it is larger than the sum of its proper divisors (1).

165508099 is an equidigital number, since it uses as much as digits as its factorization.

165508099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 97200, while the sum is 43.

The square root of 165508099 is about 12864.9951029917. The cubic root of 165508099 is about 549.0430732305.

It can be divided in two parts, 16550 and 8099, that added together give a square (24649 = 157²).

The spelling of 165508099 in words is "one hundred sixty-five million, five hundred eight thousand, ninety-nine".