164108981 has 4 divisors (see below), whose sum is σ = 164139552. Its totient is φ = 164078412.

The previous prime is 164108963. The next prime is 164108993. The reversal of 164108981 is 189801461.

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.

It is a cyclic number.

It is not a de Polignac number, because 164108981 - 2²⁶ = 97000117 is a prime.

It is a super-2 number, since 2×164108981² = 53863515289716722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164108951) 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, 4865 + ... + 18758.

It is an arithmetic number, because the mean of its divisors is an integer number (41034888).

Almost surely, 2^164108981 is an apocalyptic number.

It is an amenable number.

164108981 is a deficient number, since it is larger than the sum of its proper divisors (30571).

164108981 is an equidigital number, since it uses as much as digits as its factorization.

164108981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30570.

The product of its (nonzero) digits is 13824, while the sum is 38.

The square root of 164108981 is about 12810.5027614064. The cubic root of 164108981 is about 547.4915865071.

The spelling of 164108981 in words is "one hundred sixty-four million, one hundred eight thousand, nine hundred eighty-one".