1145784389 has 4 divisors (see below), whose sum is σ = 1149445356. Its totient is φ = 1142123424.

The previous prime is 1145784371. The next prime is 1145784391. The reversal of 1145784389 is 9834875411.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 246804100 + 898980289 = 15710^2 + 29983^2 .

It is a cyclic number.

It is not a de Polignac number, because 1145784389 - 2²⁸ = 877348933 is a prime.

It is a super-2 number, since 2×1145784389² = 2625643732152206642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145784349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1830014 + ... + 1830639.

It is an arithmetic number, because the mean of its divisors is an integer number (287361339).

Almost surely, 2^1145784389 is an apocalyptic number.

It is an amenable number.

1145784389 is a deficient number, since it is larger than the sum of its proper divisors (3660967).

1145784389 is an equidigital number, since it uses as much as digits as its factorization.

1145784389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3660966.

The product of its digits is 967680, while the sum is 50.

The square root of 1145784389 is about 33849.4370558803. The cubic root of 1145784389 is about 1046.4077968236.

The spelling of 1145784389 in words is "one billion, one hundred forty-five million, seven hundred eighty-four thousand, three hundred eighty-nine".