263420893 has 4 divisors (see below), whose sum is σ = 263454880. Its totient is φ = 263386908.

The previous prime is 263420887. The next prime is 263420903. The reversal of 263420893 is 398024362.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-263420893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263420813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 946 + ... + 22972.

It is an arithmetic number, because the mean of its divisors is an integer number (65863720).

Almost surely, 2^263420893 is an apocalyptic number.

It is an amenable number.

263420893 is a deficient number, since it is larger than the sum of its proper divisors (33987).

263420893 is a wasteful number, since it uses less digits than its factorization.

263420893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33986.

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 263420893 is about 16230.2462396601. The cubic root of 263420893 is about 641.0374555343.

The spelling of 263420893 in words is "two hundred sixty-three million, four hundred twenty thousand, eight hundred ninety-three".