1263790939 has 2 divisors, whose sum is σ = 1263790940. Its totient is φ = 1263790938.

The previous prime is 1263790937. The next prime is 1263790949. The reversal of 1263790939 is 9390973621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1263790939 - 2¹ = 1263790937 is a prime.

Together with 1263790937, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1263790892 and 1263790901.

It is not a weakly prime, because it can be changed into another prime (1263790937) 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, 631895469 + 631895470.

It is an arithmetic number, because the mean of its divisors is an integer number (631895470).

Almost surely, 2^1263790939 is an apocalyptic number.

1263790939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263790939 is an equidigital number, since it uses as much as digits as its factorization.

1263790939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 551124, while the sum is 49.

The square root of 1263790939 is about 35549.8373976591. The cubic root of 1263790939 is about 1081.1644216898.

The spelling of 1263790939 in words is "one billion, two hundred sixty-three million, seven hundred ninety thousand, nine hundred thirty-nine".