1030778509 has 4 divisors (see below), whose sum is σ = 1042360380. Its totient is φ = 1019196640.

The previous prime is 1030778477. The next prime is 1030778533. The reversal of 1030778509 is 9058770301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9058770301 = 7 ⋅1294110043.

It can be written as a sum of positive squares in 2 ways, for example, as 507375625 + 523402884 = 22525^2 + 22878^2 .

It is a cyclic number.

It is not a de Polignac number, because 1030778509 - 2⁵ = 1030778477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1030778579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5790802 + ... + 5790979.

It is an arithmetic number, because the mean of its divisors is an integer number (260590095).

Almost surely, 2^1030778509 is an apocalyptic number.

It is an amenable number.

1030778509 is a deficient number, since it is larger than the sum of its proper divisors (11581871).

1030778509 is an equidigital number, since it uses as much as digits as its factorization.

1030778509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11581870.

The product of its (nonzero) digits is 52920, while the sum is 40.

The square root of 1030778509 is about 32105.7395024628. The cubic root of 1030778509 is about 1010.1560092963.

The spelling of 1030778509 in words is "one billion, thirty million, seven hundred seventy-eight thousand, five hundred nine".