1263808061 has 2 divisors, whose sum is σ = 1263808062. Its totient is φ = 1263808060.

The previous prime is 1263808003. The next prime is 1263808111. The reversal of 1263808061 is 1608083621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1254505561 + 9302500 = 35419^2 + 3050^2 .

It is an emirp because it is prime and its reverse (1608083621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1263808061 - 2²⁶ = 1196699197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1263808361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631904030 + 631904031.

It is an arithmetic number, because the mean of its divisors is an integer number (631904031).

Almost surely, 2^1263808061 is an apocalyptic number.

It is an amenable number.

1263808061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263808061 is an equidigital number, since it uses as much as digits as its factorization.

1263808061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 1263808061 is about 35550.0782136974. The cubic root of 1263808061 is about 1081.1693042520.

The spelling of 1263808061 in words is "one billion, two hundred sixty-three million, eight hundred eight thousand, sixty-one".