1111599857 has 2 divisors, whose sum is σ = 1111599858. Its totient is φ = 1111599856.

The previous prime is 1111599851. The next prime is 1111599911. The reversal of 1111599857 is 7589951111.

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., 1104964081 + 6635776 = 33241^2 + 2576^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111599857 - 2¹⁶ = 1111534321 is a prime.

It is not a weakly prime, because it can be changed into another prime (1111599851) 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, 555799928 + 555799929.

It is an arithmetic number, because the mean of its divisors is an integer number (555799929).

Almost surely, 2^1111599857 is an apocalyptic number.

It is an amenable number.

1111599857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111599857 is an equidigital number, since it uses as much as digits as its factorization.

1111599857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 113400, while the sum is 47.

The square root of 1111599857 is about 33340.6637156491. The cubic root of 1111599857 is about 1035.8960111011.

The spelling of 1111599857 in words is "one billion, one hundred eleven million, five hundred ninety-nine thousand, eight hundred fifty-seven".