889721543 has 2 divisors, whose sum is σ = 889721544. Its totient is φ = 889721542.

The previous prime is 889721509. The next prime is 889721587. The reversal of 889721543 is 345127988.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 889721543 - 2¹² = 889717447 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (889726543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 444860771 + 444860772.

It is an arithmetic number, because the mean of its divisors is an integer number (444860772).

Almost surely, 2^889721543 is an apocalyptic number.

889721543 is a deficient number, since it is larger than the sum of its proper divisors (1).

889721543 is an equidigital number, since it uses as much as digits as its factorization.

889721543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 47.

The square root of 889721543 is about 29828.2004653315. The cubic root of 889721543 is about 961.7998436021.

The spelling of 889721543 in words is "eight hundred eighty-nine million, seven hundred twenty-one thousand, five hundred forty-three".