1263957647 has 2 divisors, whose sum is σ = 1263957648. Its totient is φ = 1263957646.

The previous prime is 1263957641. The next prime is 1263957659. The reversal of 1263957647 is 7467593621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1263957647 - 2⁴ = 1263957631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1263957595 and 1263957604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1263957641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631978823 + 631978824.

It is an arithmetic number, because the mean of its divisors is an integer number (631978824).

Almost surely, 2^1263957647 is an apocalyptic number.

1263957647 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263957647 is an equidigital number, since it uses as much as digits as its factorization.

1263957647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1905120, while the sum is 50.

The square root of 1263957647 is about 35552.1820286744. The cubic root of 1263957647 is about 1081.2119587806.

The spelling of 1263957647 in words is "one billion, two hundred sixty-three million, nine hundred fifty-seven thousand, six hundred forty-seven".