1240312793 has 2 divisors, whose sum is σ = 1240312794. Its totient is φ = 1240312792.

The previous prime is 1240312783. The next prime is 1240312813. The reversal of 1240312793 is 3972130421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1080239689 + 160073104 = 32867^2 + 12652^2 .

It is a cyclic number.

It is not a de Polignac number, because 1240312793 - 2¹⁰ = 1240311769 is a prime.

It is not a weakly prime, because it can be changed into another prime (1240312783) 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, 620156396 + 620156397.

It is an arithmetic number, because the mean of its divisors is an integer number (620156397).

Almost surely, 2^1240312793 is an apocalyptic number.

It is an amenable number.

1240312793 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240312793 is an equidigital number, since it uses as much as digits as its factorization.

1240312793 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 1240312793 is about 35218.0748054177. The cubic root of 1240312793 is about 1074.4273981028.

The spelling of 1240312793 in words is "one billion, two hundred forty million, three hundred twelve thousand, seven hundred ninety-three".