164081939 has 20 divisors (see below), whose sum is σ = 196697424. Its totient is φ = 136766448.

The previous prime is 164081927. The next prime is 164081941. The reversal of 164081939 is 939180461.

164081939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 164081939 - 2¹² = 164077843 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 164081896 and 164081905.

It is not an unprimeable number, because it can be changed into a prime (164081969) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 87914 + ... + 89760.

Almost surely, 2^164081939 is an apocalyptic number.

164081939 is a deficient number, since it is larger than the sum of its proper divisors (32615485).

164081939 is an frugal number, since it uses more digits than its factorization.

164081939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1912 (or 1891 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 164081939 is about 12809.4472558343. The cubic root of 164081939 is about 547.4615128315.

The spelling of 164081939 in words is "one hundred sixty-four million, eighty-one thousand, nine hundred thirty-nine".