863441144389 has 2 divisors, whose sum is σ = 863441144390. Its totient is φ = 863441144388.

The previous prime is 863441144351. The next prime is 863441144393. The reversal of 863441144389 is 983441144368.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 587931632289 + 275509512100 = 766767^2 + 524890^2 .

It is a cyclic number.

It is not a de Polignac number, because 863441144389 - 2¹³ = 863441136197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (863441144329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 431720572194 + 431720572195.

It is an arithmetic number, because the mean of its divisors is an integer number (431720572195).

Almost surely, 2^863441144389 is an apocalyptic number.

It is an amenable number.

863441144389 is a deficient number, since it is larger than the sum of its proper divisors (1).

863441144389 is an equidigital number, since it uses as much as digits as its factorization.

863441144389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7962624, while the sum is 55.

The spelling of 863441144389 in words is "eight hundred sixty-three billion, four hundred forty-one million, one hundred forty-four thousand, three hundred eighty-nine".