1263888873 has 32 divisors (see below), whose sum is σ = 2122601600. Its totient is φ = 736838208.

The previous prime is 1263888823. The next prime is 1263888877. The reversal of 1263888873 is 3788883621.

It is not a de Polignac number, because 1263888873 - 2²⁶ = 1196780009 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1263888877) 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 31 ways as a sum of consecutive naturals, for example, 88090 + ... + 101427.

It is an arithmetic number, because the mean of its divisors is an integer number (66331300).

Almost surely, 2^1263888873 is an apocalyptic number.

1263888873 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1263888873 is a deficient number, since it is larger than the sum of its proper divisors (858712727).

1263888873 is a wasteful number, since it uses less digits than its factorization.

1263888873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189558 (or 189552 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 54.

The square root of 1263888873 is about 35551.2147893711. The cubic root of 1263888873 is about 1081.1923482553.

The spelling of 1263888873 in words is "one billion, two hundred sixty-three million, eight hundred eighty-eight thousand, eight hundred seventy-three".