1863865441 has 2 divisors, whose sum is σ = 1863865442. Its totient is φ = 1863865440.

The previous prime is 1863865403. The next prime is 1863865463. The reversal of 1863865441 is 1445683681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1211318416 + 652547025 = 34804^2 + 25545^2 .

It is a cyclic number.

It is not a de Polignac number, because 1863865441 - 2⁷ = 1863865313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1863865391 and 1863865400.

It is not a weakly prime, because it can be changed into another prime (1863865141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 931932720 + 931932721.

It is an arithmetic number, because the mean of its divisors is an integer number (931932721).

Almost surely, 2^1863865441 is an apocalyptic number.

It is an amenable number.

1863865441 is a deficient number, since it is larger than the sum of its proper divisors (1).

1863865441 is an equidigital number, since it uses as much as digits as its factorization.

1863865441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 552960, while the sum is 46.

The square root of 1863865441 is about 43172.5079303948. The cubic root of 1863865441 is about 1230.6602842143.

The spelling of 1863865441 in words is "one billion, eight hundred sixty-three million, eight hundred sixty-five thousand, four hundred forty-one".