1263924643 has 2 divisors, whose sum is σ = 1263924644. Its totient is φ = 1263924642.

The previous prime is 1263924583. The next prime is 1263924659. The reversal of 1263924643 is 3464293621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1263924643 - 2²⁹ = 727053731 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1263924596 and 1263924605.

It is not a weakly prime, because it can be changed into another prime (1263924743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631962321 + 631962322.

It is an arithmetic number, because the mean of its divisors is an integer number (631962322).

Almost surely, 2^1263924643 is an apocalyptic number.

1263924643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263924643 is an equidigital number, since it uses as much as digits as its factorization.

1263924643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 40.

The square root of 1263924643 is about 35551.7178628544. The cubic root of 1263924643 is about 1081.2025479615.

The spelling of 1263924643 in words is "one billion, two hundred sixty-three million, nine hundred twenty-four thousand, six hundred forty-three".