164489717 has 6 divisors (see below), whose sum is σ = 191345238. Its totient is φ = 140991144.

The previous prime is 164489701. The next prime is 164489719. The reversal of 164489717 is 717984461.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 162664516 + 1825201 = 12754^2 + 1351^2 .

It is not a de Polignac number, because 164489717 - 2⁴ = 164489701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164489719) 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, 1678418 + ... + 1678515.

It is an arithmetic number, because the mean of its divisors is an integer number (31890873).

Almost surely, 2^164489717 is an apocalyptic number.

It is an amenable number.

164489717 is a deficient number, since it is larger than the sum of its proper divisors (26855521).

164489717 is an equidigital number, since it uses as much as digits as its factorization.

164489717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3356947 (or 3356940 counting only the distinct ones).

The product of its digits is 338688, while the sum is 47.

The square root of 164489717 is about 12825.3544590393. The cubic root of 164489717 is about 547.9146565109.

The spelling of 164489717 in words is "one hundred sixty-four million, four hundred eighty-nine thousand, seven hundred seventeen".