263532961 has 2 divisors, whose sum is σ = 263532962. Its totient is φ = 263532960.

The previous prime is 263532943. The next prime is 263532977. The reversal of 263532961 is 169235362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202208400 + 61324561 = 14220^2 + 7831^2 .

It is a cyclic number.

It is not a de Polignac number, because 263532961 - 2⁹ = 263532449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 263532961.

It is not a weakly prime, because it can be changed into another prime (263532161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131766480 + 131766481.

It is an arithmetic number, because the mean of its divisors is an integer number (131766481).

Almost surely, 2^263532961 is an apocalyptic number.

It is an amenable number.

263532961 is a deficient number, since it is larger than the sum of its proper divisors (1).

263532961 is an equidigital number, since it uses as much as digits as its factorization.

263532961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 37.

The square root of 263532961 is about 16233.6983155410. The cubic root of 263532961 is about 641.1283488565.

The spelling of 263532961 in words is "two hundred sixty-three million, five hundred thirty-two thousand, nine hundred sixty-one".