920681589 has 16 divisors (see below), whose sum is σ = 1272614400. Its totient is φ = 591358656.

The previous prime is 920681561. The next prime is 920681623. The reversal of 920681589 is 985186029.

It is a happy number.

It is not a de Polignac number, because 920681589 - 2⁹ = 920681077 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (920681389) 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 15 ways as a sum of consecutive naturals, for example, 30627 + ... + 52719.

It is an arithmetic number, because the mean of its divisors is an integer number (79538400).

Almost surely, 2^920681589 is an apocalyptic number.

It is an amenable number.

920681589 is a deficient number, since it is larger than the sum of its proper divisors (351932811).

920681589 is a wasteful number, since it uses less digits than its factorization.

920681589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22604.

The product of its (nonzero) digits is 311040, while the sum is 48.

The square root of 920681589 is about 30342.7353579073. The cubic root of 920681589 is about 972.8289502067.

The spelling of 920681589 in words is "nine hundred twenty million, six hundred eighty-one thousand, five hundred eighty-nine".