8013781723 has 2 divisors, whose sum is σ = 8013781724. Its totient is φ = 8013781722.

The previous prime is 8013781703. The next prime is 8013781777. The reversal of 8013781723 is 3271873108.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8013781723 - 2⁹ = 8013781211 is a prime.

It is not a weakly prime, because it can be changed into another prime (8013781703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4006890861 + 4006890862.

It is an arithmetic number, because the mean of its divisors is an integer number (4006890862).

Almost surely, 2^8013781723 is an apocalyptic number.

8013781723 is a deficient number, since it is larger than the sum of its proper divisors (1).

8013781723 is an equidigital number, since it uses as much as digits as its factorization.

8013781723 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 8013781723 is about 89519.7281217945. The cubic root of 8013781723 is about 2001.1478180475.

The spelling of 8013781723 in words is "eight billion, thirteen million, seven hundred eighty-one thousand, seven hundred twenty-three".