165139263 has 16 divisors (see below), whose sum is σ = 252544000. Its totient is φ = 106540920.

The previous prime is 165139231. The next prime is 165139277. The reversal of 165139263 is 362931561.

It is not a de Polignac number, because 165139263 - 2⁵ = 165139231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165139223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97813 + ... + 99486.

It is an arithmetic number, because the mean of its divisors is an integer number (15784000).

Almost surely, 2^165139263 is an apocalyptic number.

165139263 is a deficient number, since it is larger than the sum of its proper divisors (87404737).

165139263 is a wasteful number, since it uses less digits than its factorization.

165139263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197339 (or 197333 counting only the distinct ones).

The product of its digits is 29160, while the sum is 36.

The square root of 165139263 is about 12850.6522402561. The cubic root of 165139263 is about 548.6349210655.

The spelling of 165139263 in words is "one hundred sixty-five million, one hundred thirty-nine thousand, two hundred sixty-three".