164120947 has 4 divisors (see below), whose sum is σ = 169780320. Its totient is φ = 158461576.

The previous prime is 164120933. The next prime is 164120953. The reversal of 164120947 is 749021461.

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 164120947 - 2⁷ = 164120819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164120147) 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, 2829643 + ... + 2829700.

It is an arithmetic number, because the mean of its divisors is an integer number (42445080).

Almost surely, 2^164120947 is an apocalyptic number.

164120947 is a deficient number, since it is larger than the sum of its proper divisors (5659373).

164120947 is an equidigital number, since it uses as much as digits as its factorization.

164120947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5659372.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 164120947 is about 12810.9697915497. The cubic root of 164120947 is about 547.5048929596.

The spelling of 164120947 in words is "one hundred sixty-four million, one hundred twenty thousand, nine hundred forty-seven".