1117806257 has 2 divisors, whose sum is σ = 1117806258. Its totient is φ = 1117806256.

The previous prime is 1117806203. The next prime is 1117806323. The reversal of 1117806257 is 7526087111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 808890481 + 308915776 = 28441^2 + 17576^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1117806257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1117806257.

It is not a weakly prime, because it can be changed into another prime (1117806857) 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, 558903128 + 558903129.

It is an arithmetic number, because the mean of its divisors is an integer number (558903129).

Almost surely, 2^1117806257 is an apocalyptic number.

It is an amenable number.

1117806257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1117806257 is an equidigital number, since it uses as much as digits as its factorization.

1117806257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23520, while the sum is 38.

The square root of 1117806257 is about 33433.6096914467. The cubic root of 1117806257 is about 1037.8203416279.

The spelling of 1117806257 in words is "one billion, one hundred seventeen million, eight hundred six thousand, two hundred fifty-seven".