263416813 has 4 divisors (see below), whose sum is σ = 287363808. Its totient is φ = 239469820.

The previous prime is 263416781. The next prime is 263416823. The reversal of 263416813 is 318614362.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 263416813 - 2⁵ = 263416781 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 (263416823) 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, 11973481 + ... + 11973502.

It is an arithmetic number, because the mean of its divisors is an integer number (71840952).

Almost surely, 2^263416813 is an apocalyptic number.

It is an amenable number.

263416813 is a deficient number, since it is larger than the sum of its proper divisors (23946995).

263416813 is a wasteful number, since it uses less digits than its factorization.

263416813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23946994.

The product of its digits is 20736, while the sum is 34.

The square root of 263416813 is about 16230.1205479195. The cubic root of 263416813 is about 641.0341459432.

The spelling of 263416813 in words is "two hundred sixty-three million, four hundred sixteen thousand, eight hundred thirteen".