1263220993 has 2 divisors, whose sum is σ = 1263220994. Its totient is φ = 1263220992.

The previous prime is 1263220991. The next prime is 1263221017. The reversal of 1263220993 is 3990223621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1001849104 + 261371889 = 31652^2 + 16167^2 .

It is a cyclic number.

It is not a de Polignac number, because 1263220993 - 2¹ = 1263220991 is a prime.

Together with 1263220991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1263220991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631610496 + 631610497.

It is an arithmetic number, because the mean of its divisors is an integer number (631610497).

Almost surely, 2^1263220993 is an apocalyptic number.

It is an amenable number.

1263220993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263220993 is an equidigital number, since it uses as much as digits as its factorization.

1263220993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 1263220993 is about 35541.8203388628. The cubic root of 1263220993 is about 1081.0018689621.

The spelling of 1263220993 in words is "one billion, two hundred sixty-three million, two hundred twenty thousand, nine hundred ninety-three".