8724009 has 24 divisors (see below), whose sum is σ = 14331168. Its totient is φ = 4690560.

The previous prime is 8723993. The next prime is 8724013. The reversal of 8724009 is 9004278.

8724009 = T₃₇₂ + T₃₇₃ + ... + T₄₆₉.

It is not a de Polignac number, because 8724009 - 2⁴ = 8723993 is a prime.

It is a super-2 number, since 2×8724009² = 152216666064162, which contains 22 as substring.

8724009 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8722009) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 754 + ... + 4244.

It is an arithmetic number, because the mean of its divisors is an integer number (597132).

Almost surely, 2^8724009 is an apocalyptic number.

It is an amenable number.

8724009 is a deficient number, since it is larger than the sum of its proper divisors (5607159).

8724009 is a wasteful number, since it uses less digits than its factorization.

8724009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3525 (or 3518 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 8724009 is about 2953.6433433981. The cubic root of 8724009 is about 205.8600315408.

The spelling of 8724009 in words is "eight million, seven hundred twenty-four thousand, nine".