8725901209 has 2 divisors, whose sum is σ = 8725901210. Its totient is φ = 8725901208.

The previous prime is 8725901153. The next prime is 8725901213. The reversal of 8725901209 is 9021095278.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8200208025 + 525693184 = 90555^2 + 22928^2 .

It is a cyclic number.

It is not a de Polignac number, because 8725901209 - 2⁷ = 8725901081 is a prime.

It is a super-3 number, since 3×8725901209³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (8725901309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4362950604 + 4362950605.

It is an arithmetic number, because the mean of its divisors is an integer number (4362950605).

Almost surely, 2^8725901209 is an apocalyptic number.

It is an amenable number.

8725901209 is a deficient number, since it is larger than the sum of its proper divisors (1).

8725901209 is an equidigital number, since it uses as much as digits as its factorization.

8725901209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 8725901209 is about 93412.5323979604. The cubic root of 8725901209 is about 2058.7491392060.

The spelling of 8725901209 in words is "eight billion, seven hundred twenty-five million, nine hundred one thousand, two hundred nine".