1125778699 has 2 divisors, whose sum is σ = 1125778700. Its totient is φ = 1125778698.

The previous prime is 1125778679. The next prime is 1125778763. The reversal of 1125778699 is 9968775211.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1125778699 - 2¹³ = 1125770507 is a prime.

It is not a weakly prime, because it can be changed into another prime (1125778649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 562889349 + 562889350.

It is an arithmetic number, because the mean of its divisors is an integer number (562889350).

Almost surely, 2^1125778699 is an apocalyptic number.

1125778699 is a deficient number, since it is larger than the sum of its proper divisors (1).

1125778699 is an equidigital number, since it uses as much as digits as its factorization.

1125778699 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1905120, while the sum is 55.

The square root of 1125778699 is about 33552.6258137869. The cubic root of 1125778699 is about 1040.2818205062.

The spelling of 1125778699 in words is "one billion, one hundred twenty-five million, seven hundred seventy-eight thousand, six hundred ninety-nine".