164243437 has 8 divisors (see below), whose sum is σ = 171535104. Its totient is φ = 156964368.

The previous prime is 164243423. The next prime is 164243459. The reversal of 164243437 is 734342461.

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 164243437 - 2⁷ = 164243309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164253437) 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, 31948 + ... + 36730.

It is an arithmetic number, because the mean of its divisors is an integer number (21441888).

Almost surely, 2^164243437 is an apocalyptic number.

It is an amenable number.

164243437 is a deficient number, since it is larger than the sum of its proper divisors (7291667).

164243437 is a wasteful number, since it uses less digits than its factorization.

164243437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6299.

The product of its digits is 48384, while the sum is 34.

The square root of 164243437 is about 12815.7495684022. The cubic root of 164243437 is about 547.6410673244.

Adding to 164243437 its reverse (734342461), we get a palindrome (898585898).

The spelling of 164243437 in words is "one hundred sixty-four million, two hundred forty-three thousand, four hundred thirty-seven".