986720641 has 2 divisors, whose sum is σ = 986720642. Its totient is φ = 986720640.

The previous prime is 986720639. The next prime is 986720741. The reversal of 986720641 is 146027689.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 872316225 + 114404416 = 29535^2 + 10696^2 .

It is an emirp because it is prime and its reverse (146027689) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 986720641 - 2¹ = 986720639 is a prime.

Together with 986720639, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (986720741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493360320 + 493360321.

It is an arithmetic number, because the mean of its divisors is an integer number (493360321).

Almost surely, 2^986720641 is an apocalyptic number.

It is an amenable number.

986720641 is a deficient number, since it is larger than the sum of its proper divisors (1).

986720641 is an equidigital number, since it uses as much as digits as its factorization.

986720641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 986720641 is about 31412.1097826937. The cubic root of 986720641 is about 995.5538076722.

The spelling of 986720641 in words is "nine hundred eighty-six million, seven hundred twenty thousand, six hundred forty-one".