4687631321 has 4 divisors (see below), whose sum is σ = 4689274932. Its totient is φ = 4685987712.

The previous prime is 4687631293. The next prime is 4687631329. The reversal of 4687631321 is 1231367864.

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 1213825600 + 3473805721 = 34840^2 + 58939^2 .

It is a cyclic number.

It is not a de Polignac number, because 4687631321 - 2³⁰ = 3613889497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4687631329) 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, 817520 + ... + 823233.

It is an arithmetic number, because the mean of its divisors is an integer number (1172318733).

Almost surely, 2^4687631321 is an apocalyptic number.

It is an amenable number.

4687631321 is a deficient number, since it is larger than the sum of its proper divisors (1643611).

4687631321 is a wasteful number, since it uses less digits than its factorization.

4687631321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1643610.

The product of its digits is 145152, while the sum is 41.

The square root of 4687631321 is about 68466.2787144153. The cubic root of 4687631321 is about 1673.5980036114.

The spelling of 4687631321 in words is "four billion, six hundred eighty-seven million, six hundred thirty-one thousand, three hundred twenty-one".