9990389407 has 2 divisors, whose sum is σ = 9990389408. Its totient is φ = 9990389406.

The previous prime is 9990389393. The next prime is 9990389459. The reversal of 9990389407 is 7049830999.

9990389407 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9990389407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9990389467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4995194703 + 4995194704.

It is an arithmetic number, because the mean of its divisors is an integer number (4995194704).

Almost surely, 2^9990389407 is an apocalyptic number.

9990389407 is a deficient number, since it is larger than the sum of its proper divisors (1).

9990389407 is an equidigital number, since it uses as much as digits as its factorization.

9990389407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4408992, while the sum is 58.

The square root of 9990389407 is about 99951.9354840115. The cubic root of 9990389407 is about 2153.7442889808.

The spelling of 9990389407 in words is "nine billion, nine hundred ninety million, three hundred eighty-nine thousand, four hundred seven".