9019639009 has 2 divisors, whose sum is σ = 9019639010. Its totient is φ = 9019639008.

The previous prime is 9019638989. The next prime is 9019639039. The reversal of 9019639009 is 9009369109.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7739072784 + 1280566225 = 87972^2 + 35785^2 .

It is a cyclic number.

It is not a de Polignac number, because 9019639009 - 2¹³ = 9019630817 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9019639009.

It is not a weakly prime, because it can be changed into another prime (9019639039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4509819504 + 4509819505.

It is an arithmetic number, because the mean of its divisors is an integer number (4509819505).

Almost surely, 2^9019639009 is an apocalyptic number.

It is an amenable number.

9019639009 is a deficient number, since it is larger than the sum of its proper divisors (1).

9019639009 is an equidigital number, since it uses as much as digits as its factorization.

9019639009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 118098, while the sum is 46.

The square root of 9019639009 is about 94971.7800665019. The cubic root of 9019639009 is about 2081.5957159121.

The spelling of 9019639009 in words is "nine billion, nineteen million, six hundred thirty-nine thousand, nine".