98407994821 has 2 divisors, whose sum is σ = 98407994822. Its totient is φ = 98407994820.

The previous prime is 98407994819. The next prime is 98407994849. The reversal of 98407994821 is 12849970489.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97634376225 + 773618596 = 312465^2 + 27814^2 .

It is a cyclic number.

It is not a de Polignac number, because 98407994821 - 2¹ = 98407994819 is a prime.

Together with 98407994819, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 98407994821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98407994801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49203997410 + 49203997411.

It is an arithmetic number, because the mean of its divisors is an integer number (49203997411).

Almost surely, 2^98407994821 is an apocalyptic number.

It is an amenable number.

98407994821 is a deficient number, since it is larger than the sum of its proper divisors (1).

98407994821 is an equidigital number, since it uses as much as digits as its factorization.

98407994821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10450944, while the sum is 61.

The spelling of 98407994821 in words is "ninety-eight billion, four hundred seven million, nine hundred ninety-four thousand, eight hundred twenty-one".