1129956511 has 2 divisors, whose sum is σ = 1129956512. Its totient is φ = 1129956510.

The previous prime is 1129956491. The next prime is 1129956523. The reversal of 1129956511 is 1156599211.

It is a strong prime.

It is an emirp because it is prime and its reverse (1156599211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1129956511 - 2⁷ = 1129956383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1129956571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564978255 + 564978256.

It is an arithmetic number, because the mean of its divisors is an integer number (564978256).

Almost surely, 2^1129956511 is an apocalyptic number.

1129956511 is a deficient number, since it is larger than the sum of its proper divisors (1).

1129956511 is an equidigital number, since it uses as much as digits as its factorization.

1129956511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24300, while the sum is 40.

The square root of 1129956511 is about 33614.8257618569. The cubic root of 1129956511 is about 1041.5670751022.

The spelling of 1129956511 in words is "one billion, one hundred twenty-nine million, nine hundred fifty-six thousand, five hundred eleven".