164050405 has 4 divisors (see below), whose sum is σ = 196860492. Its totient is φ = 131240320.

The previous prime is 164050379. The next prime is 164050417. The reversal of 164050405 is 504050461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 504050461 = 149 ⋅3382889.

It can be written as a sum of positive squares in 2 ways, for example, as 54199044 + 109851361 = 7362^2 + 10481^2 .

It is not a de Polignac number, because 164050405 - 2²⁵ = 130495973 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 164050405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16405036 + ... + 16405045.

It is an arithmetic number, because the mean of its divisors is an integer number (49215123).

Almost surely, 2^164050405 is an apocalyptic number.

It is an amenable number.

164050405 is a deficient number, since it is larger than the sum of its proper divisors (32810087).

164050405 is an equidigital number, since it uses as much as digits as its factorization.

164050405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32810086.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 164050405 is about 12808.2163082921. The cubic root of 164050405 is about 547.4264393848.

The spelling of 164050405 in words is "one hundred sixty-four million, fifty thousand, four hundred five".