164990673 has 6 divisors (see below), whose sum is σ = 238319874. Its totient is φ = 109993776.

The previous prime is 164990669. The next prime is 164990689. The reversal of 164990673 is 376099461.

It can be written as a sum of positive squares in only one way, i.e., 131951169 + 33039504 = 11487^2 + 5748^2 .

It is not a de Polignac number, because 164990673 - 2² = 164990669 is a prime.

It is not an unprimeable number, because it can be changed into a prime (164990173) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9166140 + ... + 9166157.

It is an arithmetic number, because the mean of its divisors is an integer number (39719979).

Almost surely, 2^164990673 is an apocalyptic number.

It is an amenable number.

164990673 is a deficient number, since it is larger than the sum of its proper divisors (73329201).

164990673 is a wasteful number, since it uses less digits than its factorization.

164990673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18332303 (or 18332300 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 164990673 is about 12844.8695205518. The cubic root of 164990673 is about 548.4703203433.

The spelling of 164990673 in words is "one hundred sixty-four million, nine hundred ninety thousand, six hundred seventy-three".