172798 has 4 divisors (see below), whose sum is σ = 259200. Its totient is φ = 86398.

The previous prime is 172787. The next prime is 172801. The reversal of 172798 is 897271.

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

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 43198 + ... + 43201.

It is an arithmetic number, because the mean of its divisors is an integer number (64800).

2¹⁷²⁷⁹⁸ is an apocalyptic number.

172798 is a deficient number, since it is larger than the sum of its proper divisors (86402).

172798 is an equidigital number, since it uses as much as digits as its factorization.

172798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86401.

The product of its digits is 7056, while the sum is 34.

The square root of 172798 is about 415.6897881834. The cubic root of 172798 is about 55.6988511142.

The spelling of 172798 in words is "one hundred seventy-two thousand, seven hundred ninety-eight".