873852721 has 27 divisors (see below), whose sum is σ = 1052134443. Its totient is φ = 723653280.

The previous prime is 873852713. The next prime is 873852743. The reversal of 873852721 is 127258378.

The square root of 873852721 is 29561.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 42107121 + 831745600 = 6489^2 + 28840^2 .

It is not a de Polignac number, because 873852721 - 2³ = 873852713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (873852821) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 8483956 + ... + 8484058.

Almost surely, 2^873852721 is an apocalyptic number.

873852721 is the 29561-st square number.

873852721 is the 14781-st centered octagonal number.

It is an amenable number.

873852721 is a deficient number, since it is larger than the sum of its proper divisors (178281722).

873852721 is an equidigital number, since it uses as much as digits as its factorization.

873852721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302 (or 151 counting only the distinct ones).

The product of its digits is 188160, while the sum is 43.

The cubic root of 873852721 is about 956.0473769726.

The spelling of 873852721 in words is "eight hundred seventy-three million, eight hundred fifty-two thousand, seven hundred twenty-one".