8632801921 has 8 divisors (see below), whose sum is σ = 8661172520. Its totient is φ = 8604465408.

The previous prime is 8632801913. The next prime is 8632801963. The reversal of 8632801921 is 1291082368.

It can be written as a sum of positive squares in 4 ways, for example, as 1403551296 + 7229250625 = 37464^2 + 85025^2 .

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 8632801921 - 2³ = 8632801913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8632801421) 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 in 7 ways as a sum of consecutive naturals, for example, 559705 + ... + 574921.

It is an arithmetic number, because the mean of its divisors is an integer number (1082646565).

Almost surely, 2^8632801921 is an apocalyptic number.

It is an amenable number.

8632801921 is a deficient number, since it is larger than the sum of its proper divisors (28370599).

8632801921 is a wasteful number, since it uses less digits than its factorization.

8632801921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17043.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 8632801921 is about 92912.8727410793. The cubic root of 8632801921 is about 2051.4011377869.

The spelling of 8632801921 in words is "eight billion, six hundred thirty-two million, eight hundred one thousand, nine hundred twenty-one".