165136369 has 4 divisors (see below), whose sum is σ = 165966400. Its totient is φ = 164306340.

The previous prime is 165136327. The next prime is 165136379. The reversal of 165136369 is 963631561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 963631561 = 9679 ⋅99559.

It is not a de Polignac number, because 165136369 - 2⁹ = 165135857 is a prime.

It is a super-2 number, since 2×165136369² = 54540040733008322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165136319) 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, 414717 + ... + 415114.

It is an arithmetic number, because the mean of its divisors is an integer number (41491600).

Almost surely, 2^165136369 is an apocalyptic number.

It is an amenable number.

165136369 is a deficient number, since it is larger than the sum of its proper divisors (830031).

165136369 is an equidigital number, since it uses as much as digits as its factorization.

165136369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830030.

The product of its digits is 87480, while the sum is 40.

The square root of 165136369 is about 12850.5396384743. The cubic root of 165136369 is about 548.6317161771.

The spelling of 165136369 in words is "one hundred sixty-five million, one hundred thirty-six thousand, three hundred sixty-nine".