2863494721 has 2 divisors, whose sum is σ = 2863494722. Its totient is φ = 2863494720.

The previous prime is 2863494719. The next prime is 2863494727. The reversal of 2863494721 is 1274943682.

It is a happy number.

2863494721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2863427121 + 67600 = 53511^2 + 260^2 .

It is a cyclic number.

It is not a de Polignac number, because 2863494721 - 2¹ = 2863494719 is a prime.

Together with 2863494719, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2863494727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1431747360 + 1431747361.

It is an arithmetic number, because the mean of its divisors is an integer number (1431747361).

Almost surely, 2^2863494721 is an apocalyptic number.

It is an amenable number.

2863494721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2863494721 is an equidigital number, since it uses as much as digits as its factorization.

2863494721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 46.

The square root of 2863494721 is about 53511.6316421019. The cubic root of 2863494721 is about 1420.0341724567.

The spelling of 2863494721 in words is "two billion, eight hundred sixty-three million, four hundred ninety-four thousand, seven hundred twenty-one".