864245923 has 2 divisors, whose sum is σ = 864245924. Its totient is φ = 864245922.

The previous prime is 864245891. The next prime is 864245939. The reversal of 864245923 is 329542468.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 864245923 - 2⁵ = 864245891 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 864245923.

It is not a weakly prime, because it can be changed into another prime (864245323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432122961 + 432122962.

It is an arithmetic number, because the mean of its divisors is an integer number (432122962).

Almost surely, 2^864245923 is an apocalyptic number.

864245923 is a deficient number, since it is larger than the sum of its proper divisors (1).

864245923 is an equidigital number, since it uses as much as digits as its factorization.

864245923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720, while the sum is 43.

The square root of 864245923 is about 29398.0598509493. The cubic root of 864245923 is about 952.5309879857.

The spelling of 864245923 in words is "eight hundred sixty-four million, two hundred forty-five thousand, nine hundred twenty-three".