164420939 has 2 divisors, whose sum is σ = 164420940. Its totient is φ = 164420938.

The previous prime is 164420929. The next prime is 164420953. The reversal of 164420939 is 939024461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 164420939 - 2¹⁶ = 164355403 is a prime.

It is a super-3 number, since 3×164420939³ (a number of 26 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (164420929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82210469 + 82210470.

It is an arithmetic number, because the mean of its divisors is an integer number (82210470).

Almost surely, 2^164420939 is an apocalyptic number.

164420939 is a deficient number, since it is larger than the sum of its proper divisors (1).

164420939 is an equidigital number, since it uses as much as digits as its factorization.

164420939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 164420939 is about 12822.6728492932. The cubic root of 164420939 is about 547.8382794411.

The spelling of 164420939 in words is "one hundred sixty-four million, four hundred twenty thousand, nine hundred thirty-nine".