263126641 has 2 divisors, whose sum is σ = 263126642. Its totient is φ = 263126640.

The previous prime is 263126627. The next prime is 263126651. The reversal of 263126641 is 146621362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 259886641 + 3240000 = 16121^2 + 1800^2 .

It is a cyclic number.

It is not a de Polignac number, because 263126641 - 2²⁵ = 229572209 is a prime.

It is not a weakly prime, because it can be changed into another prime (263126651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131563320 + 131563321.

It is an arithmetic number, because the mean of its divisors is an integer number (131563321).

Almost surely, 2^263126641 is an apocalyptic number.

It is an amenable number.

263126641 is a deficient number, since it is larger than the sum of its proper divisors (1).

263126641 is an equidigital number, since it uses as much as digits as its factorization.

263126641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 31.

The square root of 263126641 is about 16221.1787796078. The cubic root of 263126641 is about 640.7986781802.

The spelling of 263126641 in words is "two hundred sixty-three million, one hundred twenty-six thousand, six hundred forty-one".