1139551799 has 2 divisors, whose sum is σ = 1139551800. Its totient is φ = 1139551798.

The previous prime is 1139551759. The next prime is 1139551849. The reversal of 1139551799 is 9971559311.

It is an a-pointer prime, because the next prime (1139551849) can be obtained adding 1139551799 to its sum of digits (50).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1139551799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1139551739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is an upside-down number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569775899 + 569775900.

It is an arithmetic number, because the mean of its divisors is an integer number (569775900).

Almost surely, 2^1139551799 is an apocalyptic number.

1139551799 is a deficient number, since it is larger than the sum of its proper divisors (1).

1139551799 is an equidigital number, since it uses as much as digits as its factorization.

1139551799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 382725, while the sum is 50.

The square root of 1139551799 is about 33757.2480957794. The cubic root of 1139551799 is about 1044.5070052357.

The spelling of 1139551799 in words is "one billion, one hundred thirty-nine million, five hundred fifty-one thousand, seven hundred ninety-nine".