1131288569 has 2 divisors, whose sum is σ = 1131288570. Its totient is φ = 1131288568.

The previous prime is 1131288563. The next prime is 1131288601. The reversal of 1131288569 is 9658821311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 640090000 + 491198569 = 25300^2 + 22163^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131288569 - 2¹⁶ = 1131223033 is a prime.

It is a super-2 number, since 2×1131288569² = 2559627652700135522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1131288563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565644284 + 565644285.

It is an arithmetic number, because the mean of its divisors is an integer number (565644285).

Almost surely, 2^1131288569 is an apocalyptic number.

It is an amenable number.

1131288569 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131288569 is an equidigital number, since it uses as much as digits as its factorization.

1131288569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 44.

The square root of 1131288569 is about 33634.6334750358. The cubic root of 1131288569 is about 1041.9762008532.

The spelling of 1131288569 in words is "one billion, one hundred thirty-one million, two hundred eighty-eight thousand, five hundred sixty-nine".