920628897389 has 2 divisors, whose sum is σ = 920628897390. Its totient is φ = 920628897388.

The previous prime is 920628897283. The next prime is 920628897449. The reversal of 920628897389 is 983798826029.

920628897389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 822164733289 + 98464164100 = 906733^2 + 313790^2 .

It is a cyclic number.

It is not a de Polignac number, because 920628897389 - 2²⁰ = 920627848813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (920628893389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460314448694 + 460314448695.

It is an arithmetic number, because the mean of its divisors is an integer number (460314448695).

Almost surely, 2^920628897389 is an apocalyptic number.

It is an amenable number.

920628897389 is a deficient number, since it is larger than the sum of its proper divisors (1).

920628897389 is an equidigital number, since it uses as much as digits as its factorization.

920628897389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 188116992, while the sum is 71.

The spelling of 920628897389 in words is "nine hundred twenty billion, six hundred twenty-eight million, eight hundred ninety-seven thousand, three hundred eighty-nine".