9901312019 has 2 divisors, whose sum is σ = 9901312020. Its totient is φ = 9901312018.

The previous prime is 9901312013. The next prime is 9901312027. The reversal of 9901312019 is 9102131099.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9901312019 is a prime.

It is a super-2 number, since 2×9901312019² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9901312019.

It is not a weakly prime, because it can be changed into another prime (9901312013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4950656009 + 4950656010.

It is an arithmetic number, because the mean of its divisors is an integer number (4950656010).

Almost surely, 2^9901312019 is an apocalyptic number.

9901312019 is a deficient number, since it is larger than the sum of its proper divisors (1).

9901312019 is an equidigital number, since it uses as much as digits as its factorization.

9901312019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 35.

The square root of 9901312019 is about 99505.3366357805. The cubic root of 9901312019 is about 2147.3240202319.

The spelling of 9901312019 in words is "nine billion, nine hundred one million, three hundred twelve thousand, nineteen".