164309639 has 4 divisors (see below), whose sum is σ = 176948856. Its totient is φ = 151670424.

The previous prime is 164309627. The next prime is 164309647. The reversal of 164309639 is 936903461.

164309639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164309639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 164309596 and 164309605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164309689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6319589 + ... + 6319614.

It is an arithmetic number, because the mean of its divisors is an integer number (44237214).

Almost surely, 2^164309639 is an apocalyptic number.

164309639 is a deficient number, since it is larger than the sum of its proper divisors (12639217).

164309639 is a wasteful number, since it uses less digits than its factorization.

164309639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12639216.

The product of its (nonzero) digits is 104976, while the sum is 41.

The square root of 164309639 is about 12818.3321457981. The cubic root of 164309639 is about 547.7146371111.

The spelling of 164309639 in words is "one hundred sixty-four million, three hundred nine thousand, six hundred thirty-nine".