98647841921 has 2 divisors, whose sum is σ = 98647841922. Its totient is φ = 98647841920.

The previous prime is 98647841911. The next prime is 98647841923. The reversal of 98647841921 is 12914874689.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96407145025 + 2240696896 = 310495^2 + 47336^2 .

It is a cyclic number.

It is not a de Polignac number, because 98647841921 - 2¹⁰ = 98647840897 is a prime.

Together with 98647841923, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (98647841923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49323920960 + 49323920961.

It is an arithmetic number, because the mean of its divisors is an integer number (49323920961).

Almost surely, 2^98647841921 is an apocalyptic number.

It is an amenable number.

98647841921 is a deficient number, since it is larger than the sum of its proper divisors (1).

98647841921 is an equidigital number, since it uses as much as digits as its factorization.

98647841921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6967296, while the sum is 59.

The spelling of 98647841921 in words is "ninety-eight billion, six hundred forty-seven million, eight hundred forty-one thousand, nine hundred twenty-one".