165745693 has 4 divisors (see below), whose sum is σ = 169600288. Its totient is φ = 161891100.

The previous prime is 165745687. The next prime is 165745709. The reversal of 165745693 is 396547561.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165745693 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 (165745673) 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, 1927233 + ... + 1927318.

It is an arithmetic number, because the mean of its divisors is an integer number (42400072).

Almost surely, 2^165745693 is an apocalyptic number.

It is an amenable number.

165745693 is a deficient number, since it is larger than the sum of its proper divisors (3854595).

165745693 is an equidigital number, since it uses as much as digits as its factorization.

165745693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3854594.

The product of its digits is 680400, while the sum is 46.

The square root of 165745693 is about 12874.2259184776. The cubic root of 165745693 is about 549.3056726009.

The spelling of 165745693 in words is "one hundred sixty-five million, seven hundred forty-five thousand, six hundred ninety-three".