1263680741 has 2 divisors, whose sum is σ = 1263680742. Its totient is φ = 1263680740.

The previous prime is 1263680729. The next prime is 1263680777. The reversal of 1263680741 is 1470863621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1159130116 + 104550625 = 34046^2 + 10225^2 .

It is an emirp because it is prime and its reverse (1470863621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1263680741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1263680695 and 1263680704.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1263680711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631840370 + 631840371.

It is an arithmetic number, because the mean of its divisors is an integer number (631840371).

Almost surely, 2^1263680741 is an apocalyptic number.

It is an amenable number.

1263680741 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263680741 is an equidigital number, since it uses as much as digits as its factorization.

1263680741 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 1263680741 is about 35548.2874552347. The cubic root of 1263680741 is about 1081.1329962337.

The spelling of 1263680741 in words is "one billion, two hundred sixty-three million, six hundred eighty thousand, seven hundred forty-one".