1145178869 has 2 divisors, whose sum is σ = 1145178870. Its totient is φ = 1145178868.

The previous prime is 1145178833. The next prime is 1145178877. The reversal of 1145178869 is 9688715411.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 977812900 + 167365969 = 31270^2 + 12937^2 .

It is an emirp because it is prime and its reverse (9688715411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1145178869 - 2¹² = 1145174773 is a prime.

It is a super-2 number, since 2×1145178869² = 2622869284008238322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1145178889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572589434 + 572589435.

It is an arithmetic number, because the mean of its divisors is an integer number (572589435).

Almost surely, 2^1145178869 is an apocalyptic number.

It is an amenable number.

1145178869 is a deficient number, since it is larger than the sum of its proper divisors (1).

1145178869 is an equidigital number, since it uses as much as digits as its factorization.

1145178869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 50.

The square root of 1145178869 is about 33840.4915596686. The cubic root of 1145178869 is about 1046.2234304030.

The spelling of 1145178869 in words is "one billion, one hundred forty-five million, one hundred seventy-eight thousand, eight hundred sixty-nine".