164930865 has 40 divisors (see below), whose sum is σ = 290663040. Its totient is φ = 79860000.

The previous prime is 164930827. The next prime is 164930873. The reversal of 164930865 is 568039461.

It is not a de Polignac number, because 164930865 - 2¹⁴ = 164914481 is a prime.

It is a nialpdrome in base 11.

It is a congruent number.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 219240 + ... + 219990.

It is an arithmetic number, because the mean of its divisors is an integer number (7266576).

Almost surely, 2^164930865 is an apocalyptic number.

164930865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

164930865 is a deficient number, since it is larger than the sum of its proper divisors (125732175).

164930865 is an frugal number, since it uses more digits than its factorization.

With its predecessor (164930864) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (803).

164930865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803 (or 770 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 164930865 is about 12842.5412204906. The cubic root of 164930865 is about 548.4040400768.

The spelling of 164930865 in words is "one hundred sixty-four million, nine hundred thirty thousand, eight hundred sixty-five".