164401469 has 2 divisors, whose sum is σ = 164401470. Its totient is φ = 164401468.

The previous prime is 164401459. The next prime is 164401481. The reversal of 164401469 is 964104461.

It is a happy number.

164401469 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146652100 + 17749369 = 12110^2 + 4213^2 .

It is a cyclic number.

It is not a de Polignac number, because 164401469 - 2⁸ = 164401213 is a prime.

It is a super-3 number, since 3×164401469³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164401429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82200734 + 82200735.

It is an arithmetic number, because the mean of its divisors is an integer number (82200735).

Almost surely, 2^164401469 is an apocalyptic number.

It is an amenable number.

164401469 is a deficient number, since it is larger than the sum of its proper divisors (1).

164401469 is an equidigital number, since it uses as much as digits as its factorization.

164401469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 164401469 is about 12821.9136247286. The cubic root of 164401469 is about 547.8166543925.

The spelling of 164401469 in words is "one hundred sixty-four million, four hundred one thousand, four hundred sixty-nine".