802542173 has 4 divisors (see below), whose sum is σ = 824232540. Its totient is φ = 780851808.

The previous prime is 802542157. The next prime is 802542187. The reversal of 802542173 is 371245208.

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 371024644 + 431517529 = 19262^2 + 20773^2 .

It is a cyclic number.

It is not a de Polignac number, because 802542173 - 2⁴ = 802542157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (802542193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10845128 + ... + 10845201.

It is an arithmetic number, because the mean of its divisors is an integer number (206058135).

Almost surely, 2^802542173 is an apocalyptic number.

It is an amenable number.

802542173 is a deficient number, since it is larger than the sum of its proper divisors (21690367).

802542173 is a wasteful number, since it uses less digits than its factorization.

802542173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21690366.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 802542173 is about 28329.1752968561. The cubic root of 802542173 is about 929.3000371480.

The spelling of 802542173 in words is "eight hundred two million, five hundred forty-two thousand, one hundred seventy-three".