164433121 has 2 divisors, whose sum is σ = 164433122. Its totient is φ = 164433120.

The previous prime is 164433097. The next prime is 164433211. The reversal of 164433121 is 121334461.

Together with next prime (164433211) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160275600 + 4157521 = 12660^2 + 2039^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164433121 is a prime.

It is a super-3 number, since 3×164433121³ (a number of 26 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (164431121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82216560 + 82216561.

It is an arithmetic number, because the mean of its divisors is an integer number (82216561).

Almost surely, 2^164433121 is an apocalyptic number.

It is an amenable number.

164433121 is a deficient number, since it is larger than the sum of its proper divisors (1).

164433121 is an equidigital number, since it uses as much as digits as its factorization.

164433121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 25.

The square root of 164433121 is about 12823.1478584628. The cubic root of 164433121 is about 547.8518089448.

Adding to 164433121 its reverse (121334461), we get a palindrome (285767582).

The spelling of 164433121 in words is "one hundred sixty-four million, four hundred thirty-three thousand, one hundred twenty-one".