9990389459 has 2 divisors, whose sum is σ = 9990389460. Its totient is φ = 9990389458.

The previous prime is 9990389407. The next prime is 9990389467. The reversal of 9990389459 is 9549830999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9990389459 - 2²⁰ = 9989340883 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9990389395 and 9990389404.

It is not a weakly prime, because it can be changed into another prime (9990389159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4995194729 + 4995194730.

It is an arithmetic number, because the mean of its divisors is an integer number (4995194730).

Almost surely, 2^9990389459 is an apocalyptic number.

9990389459 is a deficient number, since it is larger than the sum of its proper divisors (1).

9990389459 is an equidigital number, since it uses as much as digits as its factorization.

9990389459 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28343520, while the sum is 65.

The square root of 9990389459 is about 99951.9357441365. The cubic root of 9990389459 is about 2153.7442927176.

The spelling of 9990389459 in words is "nine billion, nine hundred ninety million, three hundred eighty-nine thousand, four hundred fifty-nine".