164435489 has 4 divisors (see below), whose sum is σ = 164961156. Its totient is φ = 163909824.

The previous prime is 164435477. The next prime is 164435507. The reversal of 164435489 is 984534461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 984534461 = 103 ⋅9558587.

It can be written as a sum of positive squares in 2 ways, for example, as 390625 + 164044864 = 625^2 + 12808^2 .

It is a cyclic number.

It is not a de Polignac number, because 164435489 - 2²⁰ = 163386913 is a prime.

It is a super-3 number, since 3×164435489³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (164435429) 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, 262364 + ... + 262989.

It is an arithmetic number, because the mean of its divisors is an integer number (41240289).

Almost surely, 2^164435489 is an apocalyptic number.

It is an amenable number.

164435489 is a deficient number, since it is larger than the sum of its proper divisors (525667).

164435489 is an equidigital number, since it uses as much as digits as its factorization.

164435489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525666.

The product of its digits is 414720, while the sum is 44.

The square root of 164435489 is about 12823.2401911529. The cubic root of 164435489 is about 547.8544388019.

The spelling of 164435489 in words is "one hundred sixty-four million, four hundred thirty-five thousand, four hundred eighty-nine".