9800999947 has 2 divisors, whose sum is σ = 9800999948. Its totient is φ = 9800999946.

The previous prime is 9800999921. The next prime is 9800999981. The reversal of 9800999947 is 7499990089.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9800999947 is a prime.

It is a super-2 number, since 2×9800999947² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9800991947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4900499973 + 4900499974.

It is an arithmetic number, because the mean of its divisors is an integer number (4900499974).

Almost surely, 2^9800999947 is an apocalyptic number.

9800999947 is a deficient number, since it is larger than the sum of its proper divisors (1).

9800999947 is an equidigital number, since it uses as much as digits as its factorization.

9800999947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13226976, while the sum is 64.

The square root of 9800999947 is about 98999.9997323232. Note that the first 3 decimals coincide. The cubic root of 9800999947 is about 2140.0477430610.

The spelling of 9800999947 in words is "nine billion, eight hundred million, nine hundred ninety-nine thousand, nine hundred forty-seven".