164172269 has 4 divisors (see below), whose sum is σ = 167665344. Its totient is φ = 160679196.

The previous prime is 164172263. The next prime is 164172271. The reversal of 164172269 is 962271461.

164172269 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, 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: 962271461 = 11939 ⋅80599.

It is a cyclic number.

It is not a de Polignac number, because 164172269 - 2²⁰ = 163123693 is a prime.

It is a super-2 number, since 2×164172269² = 53905067817216722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164172263) 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, 1746467 + ... + 1746560.

It is an arithmetic number, because the mean of its divisors is an integer number (41916336).

Almost surely, 2^164172269 is an apocalyptic number.

It is an amenable number.

164172269 is a deficient number, since it is larger than the sum of its proper divisors (3493075).

164172269 is an equidigital number, since it uses as much as digits as its factorization.

164172269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3493074.

The product of its digits is 36288, while the sum is 38.

The square root of 164172269 is about 12812.9726839637. The cubic root of 164172269 is about 547.5619568063.

The spelling of 164172269 in words is "one hundred sixty-four million, one hundred seventy-two thousand, two hundred sixty-nine".