989886409013 has 2 divisors, whose sum is σ = 989886409014. Its totient is φ = 989886409012.

The previous prime is 989886409003. The next prime is 989886409019. The reversal of 989886409013 is 310904688989.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 838629198289 + 151257210724 = 915767^2 + 388918^2 .

It is a cyclic number.

It is not a de Polignac number, because 989886409013 - 2¹² = 989886404917 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989886409019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494943204506 + 494943204507.

It is an arithmetic number, because the mean of its divisors is an integer number (494943204507).

Almost surely, 2^989886409013 is an apocalyptic number.

It is an amenable number.

989886409013 is a deficient number, since it is larger than the sum of its proper divisors (1).

989886409013 is an equidigital number, since it uses as much as digits as its factorization.

989886409013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26873856, while the sum is 65.

The spelling of 989886409013 in words is "nine hundred eighty-nine billion, eight hundred eighty-six million, four hundred nine thousand, thirteen".