172928097 has 24 divisors (see below), whose sum is σ = 268220160. Its totient is φ = 106968960.

The previous prime is 172928089. The next prime is 172928123. The reversal of 172928097 is 790829271.

It is not a de Polignac number, because 172928097 - 2³ = 172928089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172928017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2904 + ... + 18822.

It is an arithmetic number, because the mean of its divisors is an integer number (11175840).

Almost surely, 2^172928097 is an apocalyptic number.

172928097 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

172928097 is a deficient number, since it is larger than the sum of its proper divisors (95292063).

172928097 is a wasteful number, since it uses less digits than its factorization.

172928097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16013 (or 16010 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 172928097 is about 13150.2128119662. The cubic root of 172928097 is about 557.1282588173.

The spelling of 172928097 in words is "one hundred seventy-two million, nine hundred twenty-eight thousand, ninety-seven".