1293378923 has 2 divisors, whose sum is σ = 1293378924. Its totient is φ = 1293378922.

The previous prime is 1293378833. The next prime is 1293378953. The reversal of 1293378923 is 3298733921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1293378923 - 2¹⁸ = 1293116779 is a prime.

It is not a weakly prime, because it can be changed into another prime (1293378953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 646689461 + 646689462.

It is an arithmetic number, because the mean of its divisors is an integer number (646689462).

Almost surely, 2^1293378923 is an apocalyptic number.

1293378923 is a deficient number, since it is larger than the sum of its proper divisors (1).

1293378923 is an equidigital number, since it uses as much as digits as its factorization.

1293378923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 47.

The square root of 1293378923 is about 35963.5777280292. The cubic root of 1293378923 is about 1089.5368576387.

The spelling of 1293378923 in words is "one billion, two hundred ninety-three million, three hundred seventy-eight thousand, nine hundred twenty-three".