164288881 has 2 divisors, whose sum is σ = 164288882. Its totient is φ = 164288880.

The previous prime is 164288879. The next prime is 164288899. The reversal of 164288881 is 188882461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117831025 + 46457856 = 10855^2 + 6816^2 .

It is a cyclic number.

It is not a de Polignac number, because 164288881 - 2¹ = 164288879 is a prime.

It is a super-2 number, since 2×164288881² = 53981672840464322, which contains 22 as substring.

Together with 164288879, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (164288081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82144440 + 82144441.

It is an arithmetic number, because the mean of its divisors is an integer number (82144441).

Almost surely, 2^164288881 is an apocalyptic number.

It is an amenable number.

164288881 is a deficient number, since it is larger than the sum of its proper divisors (1).

164288881 is an equidigital number, since it uses as much as digits as its factorization.

164288881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 196608, while the sum is 46.

The square root of 164288881 is about 12817.5224204992. The cubic root of 164288881 is about 547.6915710282.

The spelling of 164288881 in words is "one hundred sixty-four million, two hundred eighty-eight thousand, eight hundred eighty-one".