172105969 has 8 divisors (see below), whose sum is σ = 198531648. Its totient is φ = 146140080.

The previous prime is 172105951. The next prime is 172106021. The reversal of 172105969 is 969501271.

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 172105969 - 2⁵ = 172105937 is a prime.

It is a super-2 number, since 2×172105969² = 59240929130857922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (172105939) 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, 114142 + ... + 115639.

It is an arithmetic number, because the mean of its divisors is an integer number (24816456).

Almost surely, 2^172105969 is an apocalyptic number.

It is an amenable number.

172105969 is a deficient number, since it is larger than the sum of its proper divisors (26425679).

172105969 is a wasteful number, since it uses less digits than its factorization.

172105969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229895.

The product of its (nonzero) digits is 34020, while the sum is 40.

The square root of 172105969 is about 13118.9164567810. The cubic root of 172105969 is about 556.2439635081.

The spelling of 172105969 in words is "one hundred seventy-two million, one hundred five thousand, nine hundred sixty-nine".