263420117 has 8 divisors (see below), whose sum is σ = 280005336. Its totient is φ = 246956032.

The previous prime is 263420089. The next prime is 263420119. The reversal of 263420117 is 711024362.

It can be written as a sum of positive squares in 4 ways, for example, as 131652676 + 131767441 = 11474^2 + 11479^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 263420117 - 2²⁰ = 262371541 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 (263420119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25778 + ... + 34515.

It is an arithmetic number, because the mean of its divisors is an integer number (35000667).

Almost surely, 2^263420117 is an apocalyptic number.

It is an amenable number.

263420117 is a deficient number, since it is larger than the sum of its proper divisors (16585219).

263420117 is a wasteful number, since it uses less digits than its factorization.

263420117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60567.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 263420117 is about 16230.2223336589. Note that the first 3 decimals coincide. The cubic root of 263420117 is about 641.0368260657.

Adding to 263420117 its reverse (711024362), we get a palindrome (974444479).

The spelling of 263420117 in words is "two hundred sixty-three million, four hundred twenty thousand, one hundred seventeen".