98831021 has 2 divisors, whose sum is σ = 98831022. Its totient is φ = 98831020.

The previous prime is 98831011. The next prime is 98831053. The reversal of 98831021 is 12013889.

It is an a-pointer prime, because the next prime (98831053) can be obtained adding 98831021 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49984900 + 48846121 = 7070^2 + 6989^2 .

It is a cyclic number.

It is not a de Polignac number, because 98831021 - 2⁶ = 98830957 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98831011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49415510 + 49415511.

It is an arithmetic number, because the mean of its divisors is an integer number (49415511).

Almost surely, 2^98831021 is an apocalyptic number.

It is an amenable number.

98831021 is a deficient number, since it is larger than the sum of its proper divisors (1).

98831021 is an equidigital number, since it uses as much as digits as its factorization.

98831021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 98831021 is about 9941.3792302678. The cubic root of 98831021 is about 462.3431497343.

The spelling of 98831021 in words is "ninety-eight million, eight hundred thirty-one thousand, twenty-one".