1020434689 has 8 divisors (see below), whose sum is σ = 1025917920. Its totient is φ = 1014960576.

The previous prime is 1020434683. The next prime is 1020434717. The reversal of 1020434689 is 9864340201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1020434689 - 2¹³ = 1020426497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020434683) 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 7 ways as a sum of consecutive naturals, for example, 389817 + ... + 392425.

It is an arithmetic number, because the mean of its divisors is an integer number (128239740).

Almost surely, 2^1020434689 is an apocalyptic number.

It is an amenable number.

1020434689 is a deficient number, since it is larger than the sum of its proper divisors (5483231).

1020434689 is a wasteful number, since it uses less digits than its factorization.

1020434689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4559.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 1020434689 is about 31944.2434407203. The cubic root of 1020434689 is about 1006.7656852709.

The spelling of 1020434689 in words is "one billion, twenty million, four hundred thirty-four thousand, six hundred eighty-nine".