263389964 has 12 divisors (see below), whose sum is σ = 471652104. Its totient is φ = 128632224.

The previous prime is 263389963. The next prime is 263389967. The reversal of 263389964 is 469983362.

263389964 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (263389961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 765497 + ... + 765840.

It is an arithmetic number, because the mean of its divisors is an integer number (39304342).

Almost surely, 2^263389964 is an apocalyptic number.

It is an amenable number.

263389964 is a deficient number, since it is larger than the sum of its proper divisors (208262140).

263389964 is a wasteful number, since it uses less digits than its factorization.

263389964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1531384 (or 1531382 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 50.

The square root of 263389964 is about 16229.2933918886. The cubic root of 263389964 is about 641.0123658723.

The spelling of 263389964 in words is "two hundred sixty-three million, three hundred eighty-nine thousand, nine hundred sixty-four".