863781111233 has 2 divisors, whose sum is σ = 863781111234. Its totient is φ = 863781111232.

The previous prime is 863781111187. The next prime is 863781111241. The reversal of 863781111233 is 332111187368.

863781111233 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 678288957889 + 185492153344 = 823583^2 + 430688^2 .

It is a cyclic number.

It is not a de Polignac number, because 863781111233 - 2²² = 863776916929 is a prime.

It is a super-2 number, since 2×863781111233² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (863781111253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 431890555616 + 431890555617.

It is an arithmetic number, because the mean of its divisors is an integer number (431890555617).

Almost surely, 2^863781111233 is an apocalyptic number.

It is an amenable number.

863781111233 is a deficient number, since it is larger than the sum of its proper divisors (1).

863781111233 is an equidigital number, since it uses as much as digits as its factorization.

863781111233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 44.

The spelling of 863781111233 in words is "eight hundred sixty-three billion, seven hundred eighty-one million, one hundred eleven thousand, two hundred thirty-three".