98972850421 has 2 divisors, whose sum is σ = 98972850422. Its totient is φ = 98972850420.

The previous prime is 98972850377. The next prime is 98972850479. The reversal of 98972850421 is 12405827989.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94301811396 + 4671039025 = 307086^2 + 68345^2 .

It is a cyclic number.

It is not a de Polignac number, because 98972850421 - 2⁷ = 98972850293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98972850481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49486425210 + 49486425211.

It is an arithmetic number, because the mean of its divisors is an integer number (49486425211).

Almost surely, 2^98972850421 is an apocalyptic number.

It is an amenable number.

98972850421 is a deficient number, since it is larger than the sum of its proper divisors (1).

98972850421 is an equidigital number, since it uses as much as digits as its factorization.

98972850421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2903040, while the sum is 55.

The spelling of 98972850421 in words is "ninety-eight billion, nine hundred seventy-two million, eight hundred fifty thousand, four hundred twenty-one".