172108445 has 6 divisors (see below), whose sum is σ = 206565342. Its totient is φ = 137663288.

The previous prime is 172108439. The next prime is 172108451. The reversal of 172108445 is 544801271.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (172108439) and next prime (172108451).

It can be written as a sum of positive squares in only one way, i.e., 137686756 + 34421689 = 11734^2 + 5867^2 .

It is not a de Polignac number, because 172108445 - 2⁴ = 172108429 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 5 ways as a sum of consecutive naturals, for example, 26402 + ... + 32268.

It is an arithmetic number, because the mean of its divisors is an integer number (34427557).

Almost surely, 2^172108445 is an apocalyptic number.

It is an amenable number.

172108445 is a deficient number, since it is larger than the sum of its proper divisors (34456897).

172108445 is an frugal number, since it uses more digits than its factorization.

172108445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11739 (or 5872 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 172108445 is about 13119.0108239913. The cubic root of 172108445 is about 556.2466309605.

The spelling of 172108445 in words is "one hundred seventy-two million, one hundred eight thousand, four hundred forty-five".