873278639 has 8 divisors (see below), whose sum is σ = 895086528. Its totient is φ = 851495040.

The previous prime is 873278621. The next prime is 873278669. The reversal of 873278639 is 936872378.

It is a happy number.

873278639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 873278639 - 2⁸ = 873278383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (873278669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82634 + ... + 92600.

It is an arithmetic number, because the mean of its divisors is an integer number (111885816).

Almost surely, 2^873278639 is an apocalyptic number.

873278639 is a deficient number, since it is larger than the sum of its proper divisors (21807889).

873278639 is a wasteful number, since it uses less digits than its factorization.

873278639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12145.

The product of its digits is 3048192, while the sum is 53.

The square root of 873278639 is about 29551.2882798703. The cubic root of 873278639 is about 955.8379710430.

The spelling of 873278639 in words is "eight hundred seventy-three million, two hundred seventy-eight thousand, six hundred thirty-nine".