1145178889 has 2 divisors, whose sum is σ = 1145178890. Its totient is φ = 1145178888.

The previous prime is 1145178877. The next prime is 1145178899. The reversal of 1145178889 is 9888715411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1073217600 + 71961289 = 32760^2 + 8483^2 .

It is an emirp because it is prime and its reverse (9888715411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1145178889 - 2⁷ = 1145178761 is a prime.

It is a super-2 number, since 2×1145178889² = 2622869375622548642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1145178869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572589444 + 572589445.

It is an arithmetic number, because the mean of its divisors is an integer number (572589445).

Almost surely, 2^1145178889 is an apocalyptic number.

It is an amenable number.

1145178889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1145178889 is an equidigital number, since it uses as much as digits as its factorization.

1145178889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 645120, while the sum is 52.

The square root of 1145178889 is about 33840.4918551726. The cubic root of 1145178889 is about 1046.2234364936.

The spelling of 1145178889 in words is "one billion, one hundred forty-five million, one hundred seventy-eight thousand, eight hundred eighty-nine".