172010005 has 4 divisors (see below), whose sum is σ = 206412012. Its totient is φ = 137608000.

The previous prime is 172009997. The next prime is 172010053. The reversal of 172010005 is 500010271.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 119968209 + 52041796 = 10953^2 + 7214^2 .

It is not a de Polignac number, because 172010005 - 2³ = 172009997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17200996 + ... + 17201005.

It is an arithmetic number, because the mean of its divisors is an integer number (51603003).

Almost surely, 2^172010005 is an apocalyptic number.

It is an amenable number.

172010005 is a deficient number, since it is larger than the sum of its proper divisors (34402007).

172010005 is an equidigital number, since it uses as much as digits as its factorization.

172010005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34402006.

The product of its (nonzero) digits is 70, while the sum is 16.

The square root of 172010005 is about 13115.2584801063. The cubic root of 172010005 is about 556.1405595408.

Adding to 172010005 its reverse (500010271), we get a palindrome (672020276).

The spelling of 172010005 in words is "one hundred seventy-two million, ten thousand, five".