1128509639 has 2 divisors, whose sum is σ = 1128509640. Its totient is φ = 1128509638.

The previous prime is 1128509611. The next prime is 1128509773. The reversal of 1128509639 is 9369058211.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1128509639 - 2⁸ = 1128509383 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1128509639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1128505639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564254819 + 564254820.

It is an arithmetic number, because the mean of its divisors is an integer number (564254820).

Almost surely, 2^1128509639 is an apocalyptic number.

1128509639 is a deficient number, since it is larger than the sum of its proper divisors (1).

1128509639 is an equidigital number, since it uses as much as digits as its factorization.

1128509639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 1128509639 is about 33593.2975309064. The cubic root of 1128509639 is about 1041.1223211352.

The spelling of 1128509639 in words is "one billion, one hundred twenty-eight million, five hundred nine thousand, six hundred thirty-nine".