1145669869 has 2 divisors, whose sum is σ = 1145669870. Its totient is φ = 1145669868.

The previous prime is 1145669867. The next prime is 1145669881. The reversal of 1145669869 is 9689665411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 647040969 + 498628900 = 25437^2 + 22330^2 .

It is a cyclic number.

It is not a de Polignac number, because 1145669869 - 2¹ = 1145669867 is a prime.

It is a super-2 number, since 2×1145669869² = 2625118897468954322, which contains 22 as substring.

Together with 1145669867, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1145669867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572834934 + 572834935.

It is an arithmetic number, because the mean of its divisors is an integer number (572834935).

Almost surely, 2^1145669869 is an apocalyptic number.

It is an amenable number.

1145669869 is a deficient number, since it is larger than the sum of its proper divisors (1).

1145669869 is an equidigital number, since it uses as much as digits as its factorization.

1145669869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2799360, while the sum is 55.

The square root of 1145669869 is about 33847.7454049749. The cubic root of 1145669869 is about 1046.3729331922.

The spelling of 1145669869 in words is "one billion, one hundred forty-five million, six hundred sixty-nine thousand, eight hundred sixty-nine".