164401481 has 2 divisors, whose sum is σ = 164401482. Its totient is φ = 164401480.

The previous prime is 164401469. The next prime is 164401499. The reversal of 164401481 is 184104461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127690000 + 36711481 = 11300^2 + 6059^2 .

It is an emirp because it is prime and its reverse (184104461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 164401481 - 2¹⁸ = 164139337 is a prime.

It is a super-3 number, since 3×164401481³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (164401681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82200740 + 82200741.

It is an arithmetic number, because the mean of its divisors is an integer number (82200741).

Almost surely, 2^164401481 is an apocalyptic number.

It is an amenable number.

164401481 is a deficient number, since it is larger than the sum of its proper divisors (1).

164401481 is an equidigital number, since it uses as much as digits as its factorization.

164401481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 164401481 is about 12821.9140926774. The cubic root of 164401481 is about 547.8166677213.

The spelling of 164401481 in words is "one hundred sixty-four million, four hundred one thousand, four hundred eighty-one".