165209083 has 4 divisors (see below), whose sum is σ = 177917488. Its totient is φ = 152500680.

The previous prime is 165209081. The next prime is 165209113. The reversal of 165209083 is 380902561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 165209083 - 2¹ = 165209081 is a prime.

It is a super-2 number, since 2×165209083² = 54588082211401778, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165209081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6354183 + ... + 6354208.

It is an arithmetic number, because the mean of its divisors is an integer number (44479372).

Almost surely, 2^165209083 is an apocalyptic number.

165209083 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

165209083 is a deficient number, since it is larger than the sum of its proper divisors (12708405).

165209083 is a wasteful number, since it uses less digits than its factorization.

165209083 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12708404.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 165209083 is about 12853.3685468052. The cubic root of 165209083 is about 548.7122301445.

The spelling of 165209083 in words is "one hundred sixty-five million, two hundred nine thousand, eighty-three".