1012778317 has 2 divisors, whose sum is σ = 1012778318. Its totient is φ = 1012778316.

The previous prime is 1012778309. The next prime is 1012778321. The reversal of 1012778317 is 7138772101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 975250441 + 37527876 = 31229^2 + 6126^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012778317 - 2³ = 1012778309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012778617) 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, 506389158 + 506389159.

It is an arithmetic number, because the mean of its divisors is an integer number (506389159).

Almost surely, 2^1012778317 is an apocalyptic number.

It is an amenable number.

1012778317 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012778317 is an equidigital number, since it uses as much as digits as its factorization.

1012778317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16464, while the sum is 37.

The square root of 1012778317 is about 31824.1781826334. The cubic root of 1012778317 is about 1004.2414238894.

The spelling of 1012778317 in words is "one billion, twelve million, seven hundred seventy-eight thousand, three hundred seventeen".