263007961 has 2 divisors, whose sum is σ = 263007962. Its totient is φ = 263007960.

The previous prime is 263007959. The next prime is 263007991. The reversal of 263007961 is 169700362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 251064025 + 11943936 = 15845^2 + 3456^2 .

It is a cyclic number.

It is not a de Polignac number, because 263007961 - 2¹ = 263007959 is a prime.

Together with 263007959, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (263007991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131503980 + 131503981.

It is an arithmetic number, because the mean of its divisors is an integer number (131503981).

Almost surely, 2^263007961 is an apocalyptic number.

It is an amenable number.

263007961 is a deficient number, since it is larger than the sum of its proper divisors (1).

263007961 is an equidigital number, since it uses as much as digits as its factorization.

263007961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 263007961 is about 16217.5201865143. The cubic root of 263007961 is about 640.7023222664.

The spelling of 263007961 in words is "two hundred sixty-three million, seven thousand, nine hundred sixty-one".