164723873 has 4 divisors (see below), whose sum is σ = 164817840. Its totient is φ = 164629908.

The previous prime is 164723869. The next prime is 164723879. The reversal of 164723873 is 378327461.

164723873 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 164723873 - 2² = 164723869 is a prime.

It is a super-2 number, since 2×164723873² = 54267908672240258, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 164723873.

It is not an unprimeable number, because it can be changed into a prime (164723879) 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, 44303 + ... + 47876.

It is an arithmetic number, because the mean of its divisors is an integer number (41204460).

Almost surely, 2^164723873 is an apocalyptic number.

It is an amenable number.

164723873 is a deficient number, since it is larger than the sum of its proper divisors (93967).

164723873 is an equidigital number, since it uses as much as digits as its factorization.

164723873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93966.

The product of its digits is 169344, while the sum is 41.

The square root of 164723873 is about 12834.4798492187. The cubic root of 164723873 is about 548.1745241717.

The spelling of 164723873 in words is "one hundred sixty-four million, seven hundred twenty-three thousand, eight hundred seventy-three".