889437749 has 2 divisors, whose sum is σ = 889437750. Its totient is φ = 889437748.

The previous prime is 889437721. The next prime is 889437793. The reversal of 889437749 is 947734988.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 478078225 + 411359524 = 21865^2 + 20282^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-889437749 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (889437719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 444718874 + 444718875.

It is an arithmetic number, because the mean of its divisors is an integer number (444718875).

Almost surely, 2^889437749 is an apocalyptic number.

It is an amenable number.

889437749 is a deficient number, since it is larger than the sum of its proper divisors (1).

889437749 is an equidigital number, since it uses as much as digits as its factorization.

889437749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12192768, while the sum is 59.

The square root of 889437749 is about 29823.4429434296. The cubic root of 889437749 is about 961.6975711352.

The spelling of 889437749 in words is "eight hundred eighty-nine million, four hundred thirty-seven thousand, seven hundred forty-nine".