164319161 has 4 divisors (see below), whose sum is σ = 173985012. Its totient is φ = 154653312.

The previous prime is 164319101. The next prime is 164319173. The reversal of 164319161 is 161913461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 161913461 = 4799 ⋅33739.

It can be written as a sum of positive squares in 2 ways, for example, as 57093136 + 107226025 = 7556^2 + 10355^2 .

It is a cyclic number.

It is not a de Polignac number, because 164319161 - 2¹⁸ = 164057017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164319101) 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, 4832900 + ... + 4832933.

It is an arithmetic number, because the mean of its divisors is an integer number (43496253).

Almost surely, 2^164319161 is an apocalyptic number.

It is an amenable number.

164319161 is a deficient number, since it is larger than the sum of its proper divisors (9665851).

164319161 is an equidigital number, since it uses as much as digits as its factorization.

164319161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9665850.

The product of its digits is 3888, while the sum is 32.

The square root of 164319161 is about 12818.7035615931. The cubic root of 164319161 is about 547.7252172128.

The spelling of 164319161 in words is "one hundred sixty-four million, three hundred nineteen thousand, one hundred sixty-one".