1238981963 has 36 divisors (see below), whose sum is σ = 1415216880. Its totient is φ = 1082372544.

The previous prime is 1238981959. The next prime is 1238981977. The reversal of 1238981963 is 3691898321.

It is not a de Polignac number, because 1238981963 - 2² = 1238981959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1238981923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 11366753 + ... + 11366861.

It is an arithmetic number, because the mean of its divisors is an integer number (39311580).

Almost surely, 2^1238981963 is an apocalyptic number.

1238981963 is a deficient number, since it is larger than the sum of its proper divisors (176234917).

1238981963 is a wasteful number, since it uses less digits than its factorization.

1238981963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244 (or 188 counting only the distinct ones).

The product of its digits is 559872, while the sum is 50.

The square root of 1238981963 is about 35199.1756011416. The cubic root of 1238981963 is about 1074.0429811132.

The spelling of 1238981963 in words is "one billion, two hundred thirty-eight million, nine hundred eighty-one thousand, nine hundred sixty-three".