1063931881 has 2 divisors, whose sum is σ = 1063931882. Its totient is φ = 1063931880.

The previous prime is 1063931863. The next prime is 1063931909. The reversal of 1063931881 is 1881393601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 610880656 + 453051225 = 24716^2 + 21285^2 .

It is an emirp because it is prime and its reverse (1881393601) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1063931881 - 2⁹ = 1063931369 is a prime.

It is a super-3 number, since 3×1063931881³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (1063931801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 531965940 + 531965941.

It is an arithmetic number, because the mean of its divisors is an integer number (531965941).

Almost surely, 2^1063931881 is an apocalyptic number.

It is an amenable number.

1063931881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1063931881 is an equidigital number, since it uses as much as digits as its factorization.

1063931881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 1063931881 is about 32617.9686829208. The cubic root of 1063931881 is about 1020.8719575127.

The spelling of 1063931881 in words is "one billion, sixty-three million, nine hundred thirty-one thousand, eight hundred eighty-one".