873929721 has 32 divisors (see below), whose sum is σ = 1370457088. Its totient is φ = 484989120.

The previous prime is 873929687. The next prime is 873929729. The reversal of 873929721 is 127929378.

It is not a de Polignac number, because 873929721 - 2²³ = 865541113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (873929729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 160770 + ... + 166116.

It is an arithmetic number, because the mean of its divisors is an integer number (42826784).

Almost surely, 2^873929721 is an apocalyptic number.

It is an amenable number.

873929721 is a deficient number, since it is larger than the sum of its proper divisors (496527367).

873929721 is a wasteful number, since it uses less digits than its factorization.

873929721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5581.

The product of its digits is 381024, while the sum is 48.

The square root of 873929721 is about 29562.3023629757. The cubic root of 873929721 is about 956.0754570232.

The spelling of 873929721 in words is "eight hundred seventy-three million, nine hundred twenty-nine thousand, seven hundred twenty-one".