920288689 has 4 divisors (see below), whose sum is σ = 920352256. Its totient is φ = 920225124.

The previous prime is 920288653. The next prime is 920288729. The reversal of 920288689 is 986882029.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 920288689 - 2⁹ = 920288177 is a prime.

It is a super-2 number, since 2×920288689² = 1693862542202677442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (920288989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1672 + ... + 42934.

It is an arithmetic number, because the mean of its divisors is an integer number (230088064).

Almost surely, 2^920288689 is an apocalyptic number.

It is an amenable number.

920288689 is a deficient number, since it is larger than the sum of its proper divisors (63567).

920288689 is a wasteful number, since it uses less digits than its factorization.

920288689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63566.

The product of its (nonzero) digits is 995328, while the sum is 52.

The square root of 920288689 is about 30336.2603001754. The cubic root of 920288689 is about 972.6905459045.

The spelling of 920288689 in words is "nine hundred twenty million, two hundred eighty-eight thousand, six hundred eighty-nine".