889940043493 has 2 divisors, whose sum is σ = 889940043494. Its totient is φ = 889940043492.

The previous prime is 889940043437. The next prime is 889940043541. The reversal of 889940043493 is 394340049988.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 877553021284 + 12387022209 = 936778^2 + 111297^2 .

It is a cyclic number.

It is not a de Polignac number, because 889940043493 - 2¹³ = 889940035301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (889940043403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 444970021746 + 444970021747.

It is an arithmetic number, because the mean of its divisors is an integer number (444970021747).

Almost surely, 2^889940043493 is an apocalyptic number.

It is an amenable number.

889940043493 is a deficient number, since it is larger than the sum of its proper divisors (1).

889940043493 is an equidigital number, since it uses as much as digits as its factorization.

889940043493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26873856, while the sum is 61.

The spelling of 889940043493 in words is "eight hundred eighty-nine billion, nine hundred forty million, forty-three thousand, four hundred ninety-three".