164189537 has 4 divisors (see below), whose sum is σ = 165482496. Its totient is φ = 162896580.

The previous prime is 164189497. The next prime is 164189551. The reversal of 164189537 is 735981461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 735981461 = 419 ⋅1756519.

It is a cyclic number.

It is not a de Polignac number, because 164189537 - 2¹⁴ = 164173153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164189567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 646289 + ... + 646542.

It is an arithmetic number, because the mean of its divisors is an integer number (41370624).

Almost surely, 2^164189537 is an apocalyptic number.

It is an amenable number.

164189537 is a deficient number, since it is larger than the sum of its proper divisors (1292959).

164189537 is a wasteful number, since it uses less digits than its factorization.

164189537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1292958.

The product of its digits is 181440, while the sum is 44.

The square root of 164189537 is about 12813.6465145563. The cubic root of 164189537 is about 547.5811540566.

The spelling of 164189537 in words is "one hundred sixty-four million, one hundred eighty-nine thousand, five hundred thirty-seven".