263007993 has 16 divisors (see below), whose sum is σ = 355735296. Its totient is φ = 172819920.

The previous prime is 263007991. The next prime is 263008001. The reversal of 263007993 is 399700362.

It is not a de Polignac number, because 263007993 - 2¹ = 263007991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (263007991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135238 + ... + 137168.

It is an arithmetic number, because the mean of its divisors is an integer number (22233456).

Almost surely, 2^263007993 is an apocalyptic number.

It is an amenable number.

263007993 is a deficient number, since it is larger than the sum of its proper divisors (92727303).

263007993 is a wasteful number, since it uses less digits than its factorization.

263007993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2564.

The product of its (nonzero) digits is 61236, while the sum is 39.

The square root of 263007993 is about 16217.5211731016. The cubic root of 263007993 is about 640.7023482510.

The spelling of 263007993 in words is "two hundred sixty-three million, seven thousand, nine hundred ninety-three".