164054809 has 2 divisors, whose sum is σ = 164054810. Its totient is φ = 164054808.

The previous prime is 164054789. The next prime is 164054819. The reversal of 164054809 is 908450461.

It is a happy number.

164054809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 163763209 + 291600 = 12797^2 + 540^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164054809 is a prime.

It is not a weakly prime, because it can be changed into another prime (164054819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82027404 + 82027405.

It is an arithmetic number, because the mean of its divisors is an integer number (82027405).

Almost surely, 2^164054809 is an apocalyptic number.

It is an amenable number.

164054809 is a deficient number, since it is larger than the sum of its proper divisors (1).

164054809 is an equidigital number, since it uses as much as digits as its factorization.

164054809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 164054809 is about 12808.3882280324. The cubic root of 164054809 is about 547.4313379697.

The spelling of 164054809 in words is "one hundred sixty-four million, fifty-four thousand, eight hundred nine".