986941781389 has 2 divisors, whose sum is σ = 986941781390. Its totient is φ = 986941781388.

The previous prime is 986941781369. The next prime is 986941781401. The reversal of 986941781389 is 983187149689.

986941781389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 943924947364 + 43016834025 = 971558^2 + 207405^2 .

It is a cyclic number.

It is not a de Polignac number, because 986941781389 - 2¹³ = 986941773197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (986941781369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493470890694 + 493470890695.

It is an arithmetic number, because the mean of its divisors is an integer number (493470890695).

Almost surely, 2^986941781389 is an apocalyptic number.

It is an amenable number.

986941781389 is a deficient number, since it is larger than the sum of its proper divisors (1).

986941781389 is an equidigital number, since it uses as much as digits as its factorization.

986941781389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 188116992, while the sum is 73.

The spelling of 986941781389 in words is "nine hundred eighty-six billion, nine hundred forty-one million, seven hundred eighty-one thousand, three hundred eighty-nine".