986078813 has 2 divisors, whose sum is σ = 986078814. Its totient is φ = 986078812.

The previous prime is 986078801. The next prime is 986078879. The reversal of 986078813 is 318870689.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 561595204 + 424483609 = 23698^2 + 20603^2 .

It is a cyclic number.

It is not a de Polignac number, because 986078813 - 2¹² = 986074717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (986078893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493039406 + 493039407.

It is an arithmetic number, because the mean of its divisors is an integer number (493039407).

Almost surely, 2^986078813 is an apocalyptic number.

It is an amenable number.

986078813 is a deficient number, since it is larger than the sum of its proper divisors (1).

986078813 is an equidigital number, since it uses as much as digits as its factorization.

986078813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 580608, while the sum is 50.

The square root of 986078813 is about 31401.8918697584. The cubic root of 986078813 is about 995.3379029617.

The spelling of 986078813 in words is "nine hundred eighty-six million, seventy-eight thousand, eight hundred thirteen".