863255387 has 2 divisors, whose sum is σ = 863255388. Its totient is φ = 863255386.

The previous prime is 863255381. The next prime is 863255453. The reversal of 863255387 is 783552368.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-863255387 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (863255381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 431627693 + 431627694.

It is an arithmetic number, because the mean of its divisors is an integer number (431627694).

Almost surely, 2^863255387 is an apocalyptic number.

863255387 is a deficient number, since it is larger than the sum of its proper divisors (1).

863255387 is an equidigital number, since it uses as much as digits as its factorization.

863255387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1209600, while the sum is 47.

The square root of 863255387 is about 29381.2080588937. The cubic root of 863255387 is about 952.1669415561.

The spelling of 863255387 in words is "eight hundred sixty-three million, two hundred fifty-five thousand, three hundred eighty-seven".