1263922943 has 2 divisors, whose sum is σ = 1263922944. Its totient is φ = 1263922942.

The previous prime is 1263922937. The next prime is 1263922973. The reversal of 1263922943 is 3492293621.

It is a weak prime.

It is an emirp because it is prime and its reverse (3492293621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1263922943 - 2⁴ = 1263922927 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1263922943.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1263922973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631961471 + 631961472.

It is an arithmetic number, because the mean of its divisors is an integer number (631961472).

Almost surely, 2^1263922943 is an apocalyptic number.

1263922943 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263922943 is an equidigital number, since it uses as much as digits as its factorization.

1263922943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 41.

The square root of 1263922943 is about 35551.6939540157. The cubic root of 1263922943 is about 1081.2020632161.

The spelling of 1263922943 in words is "one billion, two hundred sixty-three million, nine hundred twenty-two thousand, nine hundred forty-three".