263938 has 4 divisors (see below), whose sum is σ = 395910. Its totient is φ = 131968.

The previous prime is 263933. The next prime is 263941. The reversal of 263938 is 839362.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 257049 + 6889 = 507^2 + 83^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (263933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65983 + ... + 65986.

2²⁶³⁹³⁸ is an apocalyptic number.

263938 is a deficient number, since it is larger than the sum of its proper divisors (131972).

263938 is a wasteful number, since it uses less digits than its factorization.

263938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131971.

The product of its digits is 7776, while the sum is 31.

The square root of 263938 is about 513.7489659357. The cubic root of 263938 is about 64.1456643096.

The spelling of 263938 in words is "two hundred sixty-three thousand, nine hundred thirty-eight".