8728572397 has 2 divisors, whose sum is σ = 8728572398. Its totient is φ = 8728572396.

The previous prime is 8728572389. The next prime is 8728572421. The reversal of 8728572397 is 7932758278.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8145784516 + 582787881 = 90254^2 + 24141^2 .

It is a cyclic number.

It is not a de Polignac number, because 8728572397 - 2³ = 8728572389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8728572997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4364286198 + 4364286199.

It is an arithmetic number, because the mean of its divisors is an integer number (4364286199).

Almost surely, 2^8728572397 is an apocalyptic number.

It is an amenable number.

8728572397 is a deficient number, since it is larger than the sum of its proper divisors (1).

8728572397 is an equidigital number, since it uses as much as digits as its factorization.

8728572397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11854080, while the sum is 58.

The square root of 8728572397 is about 93426.8291070611. The cubic root of 8728572397 is about 2058.9591937248.

The spelling of 8728572397 in words is "eight billion, seven hundred twenty-eight million, five hundred seventy-two thousand, three hundred ninety-seven".