864297947 has 2 divisors, whose sum is σ = 864297948. Its totient is φ = 864297946.

The previous prime is 864297943. The next prime is 864297961. The reversal of 864297947 is 749792468.

864297947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 864297947 - 2² = 864297943 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 864297892 and 864297901.

It is not a weakly prime, because it can be changed into another prime (864297943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432148973 + 432148974.

It is an arithmetic number, because the mean of its divisors is an integer number (432148974).

Almost surely, 2^864297947 is an apocalyptic number.

864297947 is a deficient number, since it is larger than the sum of its proper divisors (1).

864297947 is an equidigital number, since it uses as much as digits as its factorization.

864297947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6096384, while the sum is 56.

The square root of 864297947 is about 29398.9446579295. The cubic root of 864297947 is about 952.5501003998.

The spelling of 864297947 in words is "eight hundred sixty-four million, two hundred ninety-seven thousand, nine hundred forty-seven".