164651827 has 4 divisors (see below), whose sum is σ = 165390400. Its totient is φ = 163913256.

The previous prime is 164651807. The next prime is 164651843. The reversal of 164651827 is 728156461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 728156461 = 17 ⋅42832733.

It is a cyclic number.

It is not a de Polignac number, because 164651827 - 2¹⁹ = 164127539 is a prime.

It is a super-2 number, since 2×164651827² = 54220448268875858, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 164651827.

It is not an unprimeable number, because it can be changed into a prime (164651807) 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, 368952 + ... + 369397.

It is an arithmetic number, because the mean of its divisors is an integer number (41347600).

Almost surely, 2^164651827 is an apocalyptic number.

164651827 is a deficient number, since it is larger than the sum of its proper divisors (738573).

164651827 is an equidigital number, since it uses as much as digits as its factorization.

164651827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738572.

The product of its digits is 80640, while the sum is 40.

The square root of 164651827 is about 12831.6728059907. The cubic root of 164651827 is about 548.0945933552.

The spelling of 164651827 in words is "one hundred sixty-four million, six hundred fifty-one thousand, eight hundred twenty-seven".