172686485 has 4 divisors (see below), whose sum is σ = 207223788. Its totient is φ = 138149184.

The previous prime is 172686473. The next prime is 172686529. The reversal of 172686485 is 584686271.

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 69338929 + 103347556 = 8327^2 + 10166^2 .

It is a cyclic number.

It is not a de Polignac number, because 172686485 - 2⁸ = 172686229 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, 17268644 + ... + 17268653.

It is an arithmetic number, because the mean of its divisors is an integer number (51805947).

Almost surely, 2^172686485 is an apocalyptic number.

It is an amenable number.

172686485 is a deficient number, since it is larger than the sum of its proper divisors (34537303).

172686485 is an equidigital number, since it uses as much as digits as its factorization.

172686485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34537302.

The product of its digits is 645120, while the sum is 47.

The square root of 172686485 is about 13141.0229814882. The cubic root of 172686485 is about 556.8686680491.

The spelling of 172686485 in words is "one hundred seventy-two million, six hundred eighty-six thousand, four hundred eighty-five".