923891641489 has 2 divisors, whose sum is σ = 923891641490. Its totient is φ = 923891641488.

The previous prime is 923891641471. The next prime is 923891641559. The reversal of 923891641489 is 984146198329.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 775866773889 + 148024867600 = 880833^2 + 384740^2 .

It is a cyclic number.

It is not a de Polignac number, because 923891641489 - 2⁵ = 923891641457 is a prime.

It is a super-2 number, since 2×923891641489² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 923891641489.

It is not a weakly prime, because it can be changed into another prime (923891641429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 461945820744 + 461945820745.

It is an arithmetic number, because the mean of its divisors is an integer number (461945820745).

Almost surely, 2^923891641489 is an apocalyptic number.

It is an amenable number.

923891641489 is a deficient number, since it is larger than the sum of its proper divisors (1).

923891641489 is an equidigital number, since it uses as much as digits as its factorization.

923891641489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26873856, while the sum is 64.

The spelling of 923891641489 in words is "nine hundred twenty-three billion, eight hundred ninety-one million, six hundred forty-one thousand, four hundred eighty-nine".