164172969 has 9 divisors (see below), whose sum is σ = 237194269. Its totient is φ = 109423020.

The previous prime is 164172947. The next prime is 164172971. The reversal of 164172969 is 969271461.

The square root of 164172969 is 12813.

It is a perfect power (a square), and thus also a powerful number.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 164172969 - 2⁵ = 164172937 is a prime.

It is a super-2 number, since 2×164172969² = 53905527500549922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164172929) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 36304 + ... + 40574.

Almost surely, 2^164172969 is an apocalyptic number.

164172969 is the 12813-rd square number.

164172969 is the 6407-th centered octagonal number.

It is an amenable number.

164172969 is a deficient number, since it is larger than the sum of its proper divisors (73021300).

164172969 is an frugal number, since it uses more digits than its factorization.

164172969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8548 (or 4274 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The cubic root of 164172969 is about 547.5627350393.

The spelling of 164172969 in words is "one hundred sixty-four million, one hundred seventy-two thousand, nine hundred sixty-nine".