164442946 has 8 divisors (see below), whose sum is σ = 250708284. Its totient is φ = 80873520.

The previous prime is 164442937. The next prime is 164442947. The reversal of 164442946 is 649244461.

It can be written as a sum of positive squares in 2 ways, for example, as 159037321 + 5405625 = 12611^2 + 2325^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 164442899 and 164442908.

It is not an unprimeable number, because it can be changed into a prime (164442947) 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, 673825 + ... + 674068.

Almost surely, 2^164442946 is an apocalyptic number.

164442946 is a deficient number, since it is larger than the sum of its proper divisors (86265338).

164442946 is a wasteful number, since it uses less digits than its factorization.

164442946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1347956.

The product of its digits is 165888, while the sum is 40.

The square root of 164442946 is about 12823.5309490015. The cubic root of 164442946 is about 547.8627202437.

The spelling of 164442946 in words is "one hundred sixty-four million, four hundred forty-two thousand, nine hundred forty-six".