989650399 has 2 divisors, whose sum is σ = 989650400. Its totient is φ = 989650398.

The previous prime is 989650379. The next prime is 989650423. The reversal of 989650399 is 993056989.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 989650399 - 2⁹ = 989649887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989650369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494825199 + 494825200.

It is an arithmetic number, because the mean of its divisors is an integer number (494825200).

Almost surely, 2^989650399 is an apocalyptic number.

989650399 is a deficient number, since it is larger than the sum of its proper divisors (1).

989650399 is an equidigital number, since it uses as much as digits as its factorization.

989650399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4723920, while the sum is 58.

The square root of 989650399 is about 31458.7094299814. The cubic root of 989650399 is about 996.5381625105.

The spelling of 989650399 in words is "nine hundred eighty-nine million, six hundred fifty thousand, three hundred ninety-nine".