172204487 has 8 divisors (see below), whose sum is σ = 211944096. Its totient is φ = 136249632.

The previous prime is 172204481. The next prime is 172204489. The reversal of 172204487 is 784402271.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 172204487 - 2²⁰ = 171155911 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172204481) 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 7 ways as a sum of consecutive naturals, for example, 946088 + ... + 946269.

It is an arithmetic number, because the mean of its divisors is an integer number (26493012).

Almost surely, 2^172204487 is an apocalyptic number.

172204487 is a deficient number, since it is larger than the sum of its proper divisors (39739609).

172204487 is a wasteful number, since it uses less digits than its factorization.

172204487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1892377.

The product of its (nonzero) digits is 25088, while the sum is 35.

The square root of 172204487 is about 13122.6707266471. The cubic root of 172204487 is about 556.3500795057.

The spelling of 172204487 in words is "one hundred seventy-two million, two hundred four thousand, four hundred eighty-seven".