164989471 has 16 divisors (see below), whose sum is σ = 181059840. Its totient is φ = 149667840.

The previous prime is 164989469. The next prime is 164989481. The reversal of 164989471 is 174989461.

It is a cyclic number.

It is not a de Polignac number, because 164989471 - 2¹ = 164989469 is a prime.

It is a super-3 number, since 3×164989471³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164989421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 177135 + ... + 178063.

It is an arithmetic number, because the mean of its divisors is an integer number (11316240).

Almost surely, 2^164989471 is an apocalyptic number.

164989471 is a deficient number, since it is larger than the sum of its proper divisors (16070369).

164989471 is a wasteful number, since it uses less digits than its factorization.

164989471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1314.

The product of its digits is 435456, while the sum is 49.

The square root of 164989471 is about 12844.8227313576. The cubic root of 164989471 is about 548.4689884237.

The spelling of 164989471 in words is "one hundred sixty-four million, nine hundred eighty-nine thousand, four hundred seventy-one".