164989441 has 4 divisors (see below), whose sum is σ = 165018672. Its totient is φ = 164960212.

The previous prime is 164989423. The next prime is 164989457. The reversal of 164989441 is 144989461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164989441 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 164989391 and 164989400.

It is not an unprimeable number, because it can be changed into a prime (164989421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3151 + ... + 18436.

It is an arithmetic number, because the mean of its divisors is an integer number (41254668).

Almost surely, 2^164989441 is an apocalyptic number.

It is an amenable number.

164989441 is a deficient number, since it is larger than the sum of its proper divisors (29231).

164989441 is an equidigital number, since it uses as much as digits as its factorization.

164989441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29230.

The product of its digits is 248832, while the sum is 46.

The square root of 164989441 is about 12844.8215635718. The cubic root of 164989441 is about 548.4689551811.

The spelling of 164989441 in words is "one hundred sixty-four million, nine hundred eighty-nine thousand, four hundred forty-one".