9997687019 has 2 divisors, whose sum is σ = 9997687020. Its totient is φ = 9997687018.

The previous prime is 9997687013. The next prime is 9997687027. The reversal of 9997687019 is 9107867999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9997687019 - 2³² = 5702719723 is a prime.

It is a super-2 number, since 2×9997687019² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9997687013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4998843509 + 4998843510.

It is an arithmetic number, because the mean of its divisors is an integer number (4998843510).

Almost surely, 2^9997687019 is an apocalyptic number.

9997687019 is a deficient number, since it is larger than the sum of its proper divisors (1).

9997687019 is an equidigital number, since it uses as much as digits as its factorization.

9997687019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15431472, while the sum is 65.

The square root of 9997687019 is about 99988.4344261875. The cubic root of 9997687019 is about 2154.2685716735.

The spelling of 9997687019 in words is "nine billion, nine hundred ninety-seven million, six hundred eighty-seven thousand, nineteen".