8712909 has 6 divisors (see below), whose sum is σ = 12585326. Its totient is φ = 5808600.

The previous prime is 8712863. The next prime is 8712919. The reversal of 8712909 is 9092178.

It is a happy number.

8712909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 8037225 + 675684 = 2835^2 + 822^2 .

It is not a de Polignac number, because 8712909 - 2⁹ = 8712397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8712919) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 484042 + ... + 484059.

Almost surely, 2^8712909 is an apocalyptic number.

It is an amenable number.

8712909 is a deficient number, since it is larger than the sum of its proper divisors (3872417).

8712909 is a wasteful number, since it uses less digits than its factorization.

8712909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968107 (or 968104 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 8712909 is about 2951.7637100554. The cubic root of 8712909 is about 205.7726857589.

It can be divided in two parts, 87 and 12909, that added together give a square (12996 = 114²).

The spelling of 8712909 in words is "eight million, seven hundred twelve thousand, nine hundred nine".