164841391 has 16 divisors (see below), whose sum is σ = 202083840. Its totient is φ = 132311520.

The previous prime is 164841331. The next prime is 164841421. The reversal of 164841391 is 193148461.

It is not a de Polignac number, because 164841391 - 2⁷ = 164841263 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 164841391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164841331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21771 + ... + 28348.

It is an arithmetic number, because the mean of its divisors is an integer number (12630240).

Almost surely, 2^164841391 is an apocalyptic number.

164841391 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

164841391 is a deficient number, since it is larger than the sum of its proper divisors (37242449).

164841391 is a wasteful number, since it uses less digits than its factorization.

164841391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50166.

The product of its digits is 20736, while the sum is 37.

The square root of 164841391 is about 12839.0572473215. The cubic root of 164841391 is about 548.3048535100.

The spelling of 164841391 in words is "one hundred sixty-four million, eight hundred forty-one thousand, three hundred ninety-one".