889521257 has 2 divisors, whose sum is σ = 889521258. Its totient is φ = 889521256.

The previous prime is 889521253. The next prime is 889521293. The reversal of 889521257 is 752125988.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 588984361 + 300536896 = 24269^2 + 17336^2 .

It is a cyclic number.

It is not a de Polignac number, because 889521257 - 2² = 889521253 is a prime.

It is not a weakly prime, because it can be changed into another prime (889521253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 444760628 + 444760629.

It is an arithmetic number, because the mean of its divisors is an integer number (444760629).

Almost surely, 2^889521257 is an apocalyptic number.

It is an amenable number.

889521257 is a deficient number, since it is larger than the sum of its proper divisors (1).

889521257 is an equidigital number, since it uses as much as digits as its factorization.

889521257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 403200, while the sum is 47.

The square root of 889521257 is about 29824.8429501314. The cubic root of 889521257 is about 961.7276676494.

It can be divided in two parts, 88952 and 1257, that added together give a palindrome (90209).

The spelling of 889521257 in words is "eight hundred eighty-nine million, five hundred twenty-one thousand, two hundred fifty-seven".