164239417 has 2 divisors, whose sum is σ = 164239418. Its totient is φ = 164239416.

The previous prime is 164239409. The next prime is 164239423. The reversal of 164239417 is 714932461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154480041 + 9759376 = 12429^2 + 3124^2 .

It is a cyclic number.

It is not a de Polignac number, because 164239417 - 2³ = 164239409 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (164239447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82119708 + 82119709.

It is an arithmetic number, because the mean of its divisors is an integer number (82119709).

Almost surely, 2^164239417 is an apocalyptic number.

It is an amenable number.

164239417 is a deficient number, since it is larger than the sum of its proper divisors (1).

164239417 is an equidigital number, since it uses as much as digits as its factorization.

164239417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 37.

The square root of 164239417 is about 12815.5927291718. The cubic root of 164239417 is about 547.6365992919.

The spelling of 164239417 in words is "one hundred sixty-four million, two hundred thirty-nine thousand, four hundred seventeen".