8561245723 has 2 divisors, whose sum is σ = 8561245724. Its totient is φ = 8561245722.

The previous prime is 8561245717. The next prime is 8561245733. The reversal of 8561245723 is 3275421658.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8561245723 - 2²⁹ = 8024374811 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8561245723.

It is not a weakly prime, because it can be changed into another prime (8561245733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4280622861 + 4280622862.

It is an arithmetic number, because the mean of its divisors is an integer number (4280622862).

Almost surely, 2^8561245723 is an apocalyptic number.

8561245723 is a deficient number, since it is larger than the sum of its proper divisors (1).

8561245723 is an equidigital number, since it uses as much as digits as its factorization.

8561245723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 403200, while the sum is 43.

The square root of 8561245723 is about 92526.9999675770. Note that the first 4 decimals coincide. The cubic root of 8561245723 is about 2045.7174705678.

The spelling of 8561245723 in words is "eight billion, five hundred sixty-one million, two hundred forty-five thousand, seven hundred twenty-three".