164239405 has 8 divisors (see below), whose sum is σ = 215004384. Its totient is φ = 119446800.

The previous prime is 164239391. The next prime is 164239409. The reversal of 164239405 is 504932461.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 164239405 - 2⁵ = 164239373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164239409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1493031 + ... + 1493140.

It is an arithmetic number, because the mean of its divisors is an integer number (26875548).

Almost surely, 2^164239405 is an apocalyptic number.

It is an amenable number.

164239405 is a deficient number, since it is larger than the sum of its proper divisors (50764979).

164239405 is a wasteful number, since it uses less digits than its factorization.

164239405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2986187.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 164239405 is about 12815.5922609921. The cubic root of 164239405 is about 547.6365859543.

The spelling of 164239405 in words is "one hundred sixty-four million, two hundred thirty-nine thousand, four hundred five".