164288891 has 8 divisors (see below), whose sum is σ = 179568144. Its totient is φ = 149387040.

The previous prime is 164288881. The next prime is 164288899. The reversal of 164288891 is 198882461.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 164288891 - 2¹⁰ = 164287867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164288899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93440 + ... + 95181.

It is an arithmetic number, because the mean of its divisors is an integer number (22446018).

Almost surely, 2^164288891 is an apocalyptic number.

164288891 is a deficient number, since it is larger than the sum of its proper divisors (15279253).

164288891 is a wasteful number, since it uses less digits than its factorization.

164288891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188701.

The product of its digits is 221184, while the sum is 47.

The square root of 164288891 is about 12817.5228105902. The cubic root of 164288891 is about 547.6915821406.

The spelling of 164288891 in words is "one hundred sixty-four million, two hundred eighty-eight thousand, eight hundred ninety-one".