164113609 has 4 divisors (see below), whose sum is σ = 179033040. Its totient is φ = 149194180.

The previous prime is 164113603. The next prime is 164113637. The reversal of 164113609 is 906311461.

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, and also an emirpimes, since its reverse is a distinct semiprime: 906311461 = 11 ⋅82391951.

It is a cyclic number.

It is not a de Polignac number, because 164113609 - 2⁵ = 164113577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164113603) 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, 7459699 + ... + 7459720.

It is an arithmetic number, because the mean of its divisors is an integer number (44758260).

Almost surely, 2^164113609 is an apocalyptic number.

It is an amenable number.

164113609 is a deficient number, since it is larger than the sum of its proper divisors (14919431).

164113609 is a wasteful number, since it uses less digits than its factorization.

164113609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14919430.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 164113609 is about 12810.6833931684. The cubic root of 164113609 is about 547.4967330205.

The spelling of 164113609 in words is "one hundred sixty-four million, one hundred thirteen thousand, six hundred nine".