1263922973 has 2 divisors, whose sum is σ = 1263922974. Its totient is φ = 1263922972.

The previous prime is 1263922943. The next prime is 1263922993. The reversal of 1263922973 is 3792293621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 706868569 + 557054404 = 26587^2 + 23602^2 .

It is a cyclic number.

It is not a de Polignac number, because 1263922973 - 2⁸ = 1263922717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1263922943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631961486 + 631961487.

It is an arithmetic number, because the mean of its divisors is an integer number (631961487).

Almost surely, 2^1263922973 is an apocalyptic number.

It is an amenable number.

1263922973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263922973 is an equidigital number, since it uses as much as digits as its factorization.

1263922973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 44.

The square root of 1263922973 is about 35551.6943759366. The cubic root of 1263922973 is about 1081.2020717704.

The spelling of 1263922973 in words is "one billion, two hundred sixty-three million, nine hundred twenty-two thousand, nine hundred seventy-three".