986904389 has 2 divisors, whose sum is σ = 986904390. Its totient is φ = 986904388.

The previous prime is 986904379. The next prime is 986904469. The reversal of 986904389 is 983409689.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 851647489 + 135256900 = 29183^2 + 11630^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-986904389 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (986904319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493452194 + 493452195.

It is an arithmetic number, because the mean of its divisors is an integer number (493452195).

Almost surely, 2^986904389 is an apocalyptic number.

It is an amenable number.

986904389 is a deficient number, since it is larger than the sum of its proper divisors (1).

986904389 is an equidigital number, since it uses as much as digits as its factorization.

986904389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3359232, while the sum is 56.

The square root of 986904389 is about 31415.0344421266. The cubic root of 986904389 is about 995.6156014766.

The spelling of 986904389 in words is "nine hundred eighty-six million, nine hundred four thousand, three hundred eighty-nine".