263138835 has 48 divisors (see below), whose sum is σ = 452424672. Its totient is φ = 130560000.

The previous prime is 263138831. The next prime is 263138839. The reversal of 263138835 is 538831362.

It is an interprime number because it is at equal distance from previous prime (263138831) and next prime (263138839).

It is not a de Polignac number, because 263138835 - 2² = 263138831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 263138793 and 263138802.

It is not an unprimeable number, because it can be changed into a prime (263138831) 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 47 ways as a sum of consecutive naturals, for example, 437535 + ... + 438135.

It is an arithmetic number, because the mean of its divisors is an integer number (9425514).

Almost surely, 2^263138835 is an apocalyptic number.

263138835 is a deficient number, since it is larger than the sum of its proper divisors (189285837).

263138835 is a wasteful number, since it uses less digits than its factorization.

263138835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744 (or 727 counting only the distinct ones).

The product of its digits is 103680, while the sum is 39.

The square root of 263138835 is about 16221.5546418955. The cubic root of 263138835 is about 640.8085768084.

The spelling of 263138835 in words is "two hundred sixty-three million, one hundred thirty-eight thousand, eight hundred thirty-five".