1139243263 has 2 divisors, whose sum is σ = 1139243264. Its totient is φ = 1139243262.

The previous prime is 1139243251. The next prime is 1139243267. The reversal of 1139243263 is 3623429311.

It is a strong prime.

It is an emirp because it is prime and its reverse (3623429311) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1139243263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1139243267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569621631 + 569621632.

It is an arithmetic number, because the mean of its divisors is an integer number (569621632).

Almost surely, 2^1139243263 is an apocalyptic number.

1139243263 is a deficient number, since it is larger than the sum of its proper divisors (1).

1139243263 is an equidigital number, since it uses as much as digits as its factorization.

1139243263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 34.

The square root of 1139243263 is about 33752.6778641340. The cubic root of 1139243263 is about 1044.4127292513.

The spelling of 1139243263 in words is "one billion, one hundred thirty-nine million, two hundred forty-three thousand, two hundred sixty-three".