164421827 has 4 divisors (see below), whose sum is σ = 164774376. Its totient is φ = 164069280.

The previous prime is 164421797. The next prime is 164421853. The reversal of 164421827 is 728124461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 164421827 - 2¹⁴ = 164405443 is a prime.

It is a super-3 number, since 3×164421827³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164421857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175574 + ... + 176507.

It is an arithmetic number, because the mean of its divisors is an integer number (41193594).

Almost surely, 2^164421827 is an apocalyptic number.

164421827 is a deficient number, since it is larger than the sum of its proper divisors (352549).

164421827 is an equidigital number, since it uses as much as digits as its factorization.

164421827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352548.

The product of its digits is 21504, while the sum is 35.

The square root of 164421827 is about 12822.7074754125. The cubic root of 164421827 is about 547.8392656892.

The spelling of 164421827 in words is "one hundred sixty-four million, four hundred twenty-one thousand, eight hundred twenty-seven".