8640969 has 8 divisors (see below), whose sum is σ = 11548032. Its totient is φ = 5747280.

The previous prime is 8640967. The next prime is 8640977. The reversal of 8640969 is 9690468.

8640969 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8640969 - 2¹ = 8640967 is a prime.

It is a super-2 number, since 2×8640969² = 149332690517922, which contains 22 as substring.

It is a Curzon number.

8640969 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 8640969.

It is not an unprimeable number, because it can be changed into a prime (8640967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1722 + ... + 4499.

It is an arithmetic number, because the mean of its divisors is an integer number (1443504).

Almost surely, 2^8640969 is an apocalyptic number.

It is an amenable number.

8640969 is a deficient number, since it is larger than the sum of its proper divisors (2907063).

8640969 is a wasteful number, since it uses less digits than its factorization.

8640969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6687.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 8640969 is about 2939.5525169658. The cubic root of 8640969 is about 205.2047844565.

The spelling of 8640969 in words is "eight million, six hundred forty thousand, nine hundred sixty-nine".