986843749 has 2 divisors, whose sum is σ = 986843750. Its totient is φ = 986843748.

The previous prime is 986843707. The next prime is 986843771. The reversal of 986843749 is 947348689.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 982509025 + 4334724 = 31345^2 + 2082^2 .

It is a cyclic number.

It is not a de Polignac number, because 986843749 - 2⁷ = 986843621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 986843693 and 986843702.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (986843779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493421874 + 493421875.

It is an arithmetic number, because the mean of its divisors is an integer number (493421875).

Almost surely, 2^986843749 is an apocalyptic number.

It is an amenable number.

986843749 is a deficient number, since it is larger than the sum of its proper divisors (1).

986843749 is an equidigital number, since it uses as much as digits as its factorization.

986843749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10450944, while the sum is 58.

The square root of 986843749 is about 31414.0692843191. The cubic root of 986843749 is about 995.5952093065.

The spelling of 986843749 in words is "nine hundred eighty-six million, eight hundred forty-three thousand, seven hundred forty-nine".