172720675 has 6 divisors (see below), whose sum is σ = 214173668. Its totient is φ = 138176520.

The previous prime is 172720673. The next prime is 172720679. The reversal of 172720675 is 576027271.

It is not a de Polignac number, because 172720675 - 2¹ = 172720673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172720673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3454389 + ... + 3454438.

Almost surely, 2^172720675 is an apocalyptic number.

172720675 is a deficient number, since it is larger than the sum of its proper divisors (41452993).

172720675 is an equidigital number, since it uses as much as digits as its factorization.

172720675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6908837 (or 6908832 counting only the distinct ones).

The product of its (nonzero) digits is 41160, while the sum is 37.

The square root of 172720675 is about 13142.3238051724. The cubic root of 172720675 is about 556.9054168879.

The spelling of 172720675 in words is "one hundred seventy-two million, seven hundred twenty thousand, six hundred seventy-five".