889957421 has 2 divisors, whose sum is σ = 889957422. Its totient is φ = 889957420.

The previous prime is 889957403. The next prime is 889957441. The reversal of 889957421 is 124759988.

889957421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 758396521 + 131560900 = 27539^2 + 11470^2 .

It is a cyclic number.

It is not a de Polignac number, because 889957421 - 2¹⁴ = 889941037 is a prime.

It is a super-2 number, since 2×889957421² = 1584048422385942482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (889957441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 444978710 + 444978711.

It is an arithmetic number, because the mean of its divisors is an integer number (444978711).

Almost surely, 2^889957421 is an apocalyptic number.

It is an amenable number.

889957421 is a deficient number, since it is larger than the sum of its proper divisors (1).

889957421 is an equidigital number, since it uses as much as digits as its factorization.

889957421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1451520, while the sum is 53.

The square root of 889957421 is about 29832.1541461558. The cubic root of 889957421 is about 961.8848317573.

The spelling of 889957421 in words is "eight hundred eighty-nine million, nine hundred fifty-seven thousand, four hundred twenty-one".