172897969 has 8 divisors (see below), whose sum is σ = 184612032. Its totient is φ = 161533680.

The previous prime is 172897957. The next prime is 172897987. The reversal of 172897969 is 969798271.

It is a happy number.

172897969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 172897969 - 2²³ = 164509361 is a prime.

It is a super-2 number, since 2×172897969² = 59787415368649922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172897909) 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, 86422 + ... + 88399.

It is an arithmetic number, because the mean of its divisors is an integer number (23076504).

Almost surely, 2^172897969 is an apocalyptic number.

It is an amenable number.

172897969 is a deficient number, since it is larger than the sum of its proper divisors (11714063).

172897969 is a wasteful number, since it uses less digits than its factorization.

172897969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174887.

The product of its digits is 3429216, while the sum is 58.

The square root of 172897969 is about 13149.0672292752. The cubic root of 172897969 is about 557.0959021416.

The spelling of 172897969 in words is "one hundred seventy-two million, eight hundred ninety-seven thousand, nine hundred sixty-nine".