165626873 has 4 divisors (see below), whose sum is σ = 166020708. Its totient is φ = 165233040.

The previous prime is 165626861. The next prime is 165626899. The reversal of 165626873 is 378626561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 378626561 = 709 ⋅534029.

It can be written as a sum of positive squares in 2 ways, for example, as 47513449 + 118113424 = 6893^2 + 10868^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165626873 is a prime.

It is a super-2 number, since 2×165626873² = 54864522119516258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165626803) 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, 196286 + ... + 197127.

It is an arithmetic number, because the mean of its divisors is an integer number (41505177).

Almost surely, 2^165626873 is an apocalyptic number.

It is an amenable number.

165626873 is a deficient number, since it is larger than the sum of its proper divisors (393835).

165626873 is an equidigital number, since it uses as much as digits as its factorization.

165626873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393834.

The product of its digits is 362880, while the sum is 44.

The square root of 165626873 is about 12869.6104447648. The cubic root of 165626873 is about 549.1743788870.

The spelling of 165626873 in words is "one hundred sixty-five million, six hundred twenty-six thousand, eight hundred seventy-three".