2721395863 has 2 divisors, whose sum is σ = 2721395864. Its totient is φ = 2721395862.

The previous prime is 2721395861. The next prime is 2721395881. The reversal of 2721395863 is 3685931272.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2721395863 - 2¹ = 2721395861 is a prime.

Together with 2721395861, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2721395861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1360697931 + 1360697932.

It is an arithmetic number, because the mean of its divisors is an integer number (1360697932).

Almost surely, 2^2721395863 is an apocalyptic number.

2721395863 is a deficient number, since it is larger than the sum of its proper divisors (1).

2721395863 is an equidigital number, since it uses as much as digits as its factorization.

2721395863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 46.

The square root of 2721395863 is about 52166.9997508003. Note that the first 3 decimals coincide. The cubic root of 2721395863 is about 1396.1451545890.

The spelling of 2721395863 in words is "two billion, seven hundred twenty-one million, three hundred ninety-five thousand, eight hundred sixty-three".