165943713 has 32 divisors (see below), whose sum is σ = 254499840. Its totient is φ = 95397120.

The previous prime is 165943709. The next prime is 165943717. The reversal of 165943713 is 317349561.

It is an interprime number because it is at equal distance from previous prime (165943709) and next prime (165943717).

It is not a de Polignac number, because 165943713 - 2² = 165943709 is a prime.

It is a super-3 number, since 3×165943713³ (a number of 26 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (165943717) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32695 + ... + 37427.

It is an arithmetic number, because the mean of its divisors is an integer number (7953120).

Almost surely, 2^165943713 is an apocalyptic number.

165943713 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

165943713 is a deficient number, since it is larger than the sum of its proper divisors (88556127).

165943713 is a wasteful number, since it uses less digits than its factorization.

165943713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4809.

The product of its digits is 68040, while the sum is 39.

The square root of 165943713 is about 12881.9141822945. The cubic root of 165943713 is about 549.5243413700.

The spelling of 165943713 in words is "one hundred sixty-five million, nine hundred forty-three thousand, seven hundred thirteen".