165739133 has 4 divisors (see below), whose sum is σ = 189416160. Its totient is φ = 142062108.

The previous prime is 165739121. The next prime is 165739151. The reversal of 165739133 is 331937561.

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: 331937561 = 229 ⋅1449509.

It is a cyclic number.

It is not a de Polignac number, because 165739133 - 2⁴ = 165739117 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 (165739153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11838503 + ... + 11838516.

It is an arithmetic number, because the mean of its divisors is an integer number (47354040).

Almost surely, 2^165739133 is an apocalyptic number.

It is an amenable number.

165739133 is a deficient number, since it is larger than the sum of its proper divisors (23677027).

165739133 is an equidigital number, since it uses as much as digits as its factorization.

165739133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23677026.

The product of its digits is 51030, while the sum is 38.

The square root of 165739133 is about 12873.9711433574. The cubic root of 165739133 is about 549.2984255695.

The spelling of 165739133 in words is "one hundred sixty-five million, seven hundred thirty-nine thousand, one hundred thirty-three".