172763842 has 4 divisors (see below), whose sum is σ = 259145766. Its totient is φ = 86381920.

The previous prime is 172763839. The next prime is 172763849. The reversal of 172763842 is 248367271.

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

It can be written as a sum of positive squares in only one way, i.e., 100020001 + 72743841 = 10001^2 + 8529^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 172763795 and 172763804.

It is not an unprimeable number, because it can be changed into a prime (172763849) by changing a digit.

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, 43190959 + ... + 43190962.

Almost surely, 2^172763842 is an apocalyptic number.

172763842 is a deficient number, since it is larger than the sum of its proper divisors (86381924).

172763842 is an equidigital number, since it uses as much as digits as its factorization.

172763842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86381923.

The product of its digits is 112896, while the sum is 40.

The square root of 172763842 is about 13143.9659920436. The cubic root of 172763842 is about 556.9518076547.

The spelling of 172763842 in words is "one hundred seventy-two million, seven hundred sixty-three thousand, eight hundred forty-two".