263161663 has 2 divisors, whose sum is σ = 263161664. Its totient is φ = 263161662.

The previous prime is 263161603. The next prime is 263161667. The reversal of 263161663 is 366161362.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-263161663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263161667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131580831 + 131580832.

It is an arithmetic number, because the mean of its divisors is an integer number (131580832).

Almost surely, 2^263161663 is an apocalyptic number.

263161663 is a deficient number, since it is larger than the sum of its proper divisors (1).

263161663 is an equidigital number, since it uses as much as digits as its factorization.

263161663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 34.

The square root of 263161663 is about 16222.2582583314. The cubic root of 263161663 is about 640.8271068937.

The spelling of 263161663 in words is "two hundred sixty-three million, one hundred sixty-one thousand, six hundred sixty-three".