2683631921 has 4 divisors (see below), whose sum is σ = 2683745652. Its totient is φ = 2683518192.

The previous prime is 2683631893. The next prime is 2683631969. The reversal of 2683631921 is 1291363862.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1461150625 + 1222481296 = 38225^2 + 34964^2 .

It is a cyclic number.

It is not a de Polignac number, because 2683631921 - 2⁶ = 2683631857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2683630921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6746 + ... + 73571.

It is an arithmetic number, because the mean of its divisors is an integer number (670936413).

Almost surely, 2^2683631921 is an apocalyptic number.

It is an amenable number.

2683631921 is a deficient number, since it is larger than the sum of its proper divisors (113731).

2683631921 is an equidigital number, since it uses as much as digits as its factorization.

2683631921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113730.

The product of its digits is 93312, while the sum is 41.

The square root of 2683631921 is about 51803.7828831061. The cubic root of 2683631921 is about 1389.6570968930.

The spelling of 2683631921 in words is "two billion, six hundred eighty-three million, six hundred thirty-one thousand, nine hundred twenty-one".