8640297 has 8 divisors (see below), whose sum is σ = 12800480. Its totient is φ = 5760180.

The previous prime is 8640287. The next prime is 8640329. The reversal of 8640297 is 7920468.

8640297 is a `hidden beast` number, since 8 + 640 + 2 + 9 + 7 = 666.

8640297 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 not a de Polignac number, because 8640297 - 2⁷ = 8640169 is a prime.

It is a Duffinian number.

8640297 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8640287) 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, 159979 + ... + 160032.

It is an arithmetic number, because the mean of its divisors is an integer number (1600060).

Almost surely, 2^8640297 is an apocalyptic number.

It is an amenable number.

8640297 is a deficient number, since it is larger than the sum of its proper divisors (4160183).

8640297 is a wasteful number, since it uses less digits than its factorization.

8640297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320020 (or 320014 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 8640297 is about 2939.4382116316. The cubic root of 8640297 is about 205.1994647912.

The spelling of 8640297 in words is "eight million, six hundred forty thousand, two hundred ninety-seven".