1139195591 has 2 divisors, whose sum is σ = 1139195592. Its totient is φ = 1139195590.

The previous prime is 1139195579. The next prime is 1139195623. The reversal of 1139195591 is 1955919311.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1139195591 - 2⁶ = 1139195527 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1139185591) 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, 569597795 + 569597796.

It is an arithmetic number, because the mean of its divisors is an integer number (569597796).

Almost surely, 2^1139195591 is an apocalyptic number.

1139195591 is a deficient number, since it is larger than the sum of its proper divisors (1).

1139195591 is an equidigital number, since it uses as much as digits as its factorization.

1139195591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54675, while the sum is 44.

The square root of 1139195591 is about 33751.9716609267. The cubic root of 1139195591 is about 1044.3981611195.

The spelling of 1139195591 in words is "one billion, one hundred thirty-nine million, one hundred ninety-five thousand, five hundred ninety-one".