1789142409 has 12 divisors (see below), whose sum is σ = 2644417776. Its totient is φ = 1165022712.

The previous prime is 1789142393. The next prime is 1789142413. The reversal of 1789142409 is 9042419871.

It is a happy number.

It is not a de Polignac number, because 1789142409 - 2⁴ = 1789142393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1789142479) 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 in 11 ways as a sum of consecutive naturals, for example, 2311167 + ... + 2311940.

It is an arithmetic number, because the mean of its divisors is an integer number (220368148).

Almost surely, 2^1789142409 is an apocalyptic number.

It is an amenable number.

1789142409 is a deficient number, since it is larger than the sum of its proper divisors (855275367).

1789142409 is a wasteful number, since it uses less digits than its factorization.

1789142409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4623156 (or 4623153 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 1789142409 is about 42298.2553895548. The cubic root of 1789142409 is about 1213.9896106397.

The spelling of 1789142409 in words is "one billion, seven hundred eighty-nine million, one hundred forty-two thousand, four hundred nine".