164481309 has 12 divisors (see below), whose sum is σ = 250088800. Its totient is φ = 103882824.

The previous prime is 164481283. The next prime is 164481323. The reversal of 164481309 is 903184461.

164481309 is a `hidden beast` number, since 1 + 644 + 8 + 1 + 3 + 0 + 9 = 666.

It is not a de Polignac number, because 164481309 - 2⁵ = 164481277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164481379) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 480769 + ... + 481110.

Almost surely, 2^164481309 is an apocalyptic number.

164481309 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

164481309 is a deficient number, since it is larger than the sum of its proper divisors (85607491).

164481309 is a wasteful number, since it uses less digits than its factorization.

164481309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961904 (or 961901 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 164481309 is about 12825.0266666389. The cubic root of 164481309 is about 547.9053206792.

The spelling of 164481309 in words is "one hundred sixty-four million, four hundred eighty-one thousand, three hundred nine".