1005111797 has 2 divisors, whose sum is σ = 1005111798. Its totient is φ = 1005111796.

The previous prime is 1005111749. The next prime is 1005111803. The reversal of 1005111797 is 7971115001.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 999128881 + 5982916 = 31609^2 + 2446^2 .

It is a cyclic number.

It is not a de Polignac number, because 1005111797 - 2⁶ = 1005111733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1005111727) 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, 502555898 + 502555899.

It is an arithmetic number, because the mean of its divisors is an integer number (502555899).

Almost surely, 2^1005111797 is an apocalyptic number.

It is an amenable number.

1005111797 is a deficient number, since it is larger than the sum of its proper divisors (1).

1005111797 is an equidigital number, since it uses as much as digits as its factorization.

1005111797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2205, while the sum is 32.

The square root of 1005111797 is about 31703.4981823773. The cubic root of 1005111797 is about 1001.7010371652.

Adding to 1005111797 its reverse (7971115001), we get a palindrome (8976226798).

The spelling of 1005111797 in words is "one billion, five million, one hundred eleven thousand, seven hundred ninety-seven".