164989439 has 8 divisors (see below), whose sum is σ = 170858160. Its totient is φ = 159132736.

The previous prime is 164989423. The next prime is 164989457. The reversal of 164989439 is 934989461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 164989439 - 2⁴ = 164989423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164989469) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32027 + ... + 36819.

It is an arithmetic number, because the mean of its divisors is an integer number (21357270).

Almost surely, 2^164989439 is an apocalyptic number.

164989439 is a deficient number, since it is larger than the sum of its proper divisors (5868721).

164989439 is a wasteful number, since it uses less digits than its factorization.

164989439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6009.

The product of its digits is 1679616, while the sum is 53.

The square root of 164989439 is about 12844.8214857194. The cubic root of 164989439 is about 548.4689529649.

The spelling of 164989439 in words is "one hundred sixty-four million, nine hundred eighty-nine thousand, four hundred thirty-nine".