165806119 has 2 divisors, whose sum is σ = 165806120. Its totient is φ = 165806118.

The previous prime is 165806099. The next prime is 165806129. The reversal of 165806119 is 911608561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165806119 - 2¹³ = 165797927 is a prime.

It is a super-2 number, since 2×165806119² = 54983338195684322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165806129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82903059 + 82903060.

It is an arithmetic number, because the mean of its divisors is an integer number (82903060).

Almost surely, 2^165806119 is an apocalyptic number.

165806119 is a deficient number, since it is larger than the sum of its proper divisors (1).

165806119 is an equidigital number, since it uses as much as digits as its factorization.

165806119 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 37.

The square root of 165806119 is about 12876.5724864966. The cubic root of 165806119 is about 549.3724180492.

The spelling of 165806119 in words is "one hundred sixty-five million, eight hundred six thousand, one hundred nineteen".