889946513 has 2 divisors, whose sum is σ = 889946514. Its totient is φ = 889946512.

The previous prime is 889946503. The next prime is 889946557. The reversal of 889946513 is 315649988.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 482593024 + 407353489 = 21968^2 + 20183^2 .

It is a cyclic number.

It is not a de Polignac number, because 889946513 - 2⁸ = 889946257 is a prime.

It is not a weakly prime, because it can be changed into another prime (889946503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 444973256 + 444973257.

It is an arithmetic number, because the mean of its divisors is an integer number (444973257).

Almost surely, 2^889946513 is an apocalyptic number.

It is an amenable number.

889946513 is a deficient number, since it is larger than the sum of its proper divisors (1).

889946513 is an equidigital number, since it uses as much as digits as its factorization.

889946513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1866240, while the sum is 53.

The square root of 889946513 is about 29831.9713227269. The cubic root of 889946513 is about 961.8809018754.

The spelling of 889946513 in words is "eight hundred eighty-nine million, nine hundred forty-six thousand, five hundred thirteen".