164021147 has 4 divisors (see below), whose sum is σ = 166331376. Its totient is φ = 161710920.

The previous prime is 164021069. The next prime is 164021149. The reversal of 164021147 is 741120461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 741120461 = 313 ⋅2367797.

It is a cyclic number.

It is not a de Polignac number, because 164021147 - 2²⁰ = 162972571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164021149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1155008 + ... + 1155149.

It is an arithmetic number, because the mean of its divisors is an integer number (41582844).

Almost surely, 2^164021147 is an apocalyptic number.

164021147 is a deficient number, since it is larger than the sum of its proper divisors (2310229).

164021147 is an equidigital number, since it uses as much as digits as its factorization.

164021147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2310228.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 164021147 is about 12807.0740998871. The cubic root of 164021147 is about 547.3938933816.

The spelling of 164021147 in words is "one hundred sixty-four million, twenty-one thousand, one hundred forty-seven".