98167721 has 2 divisors, whose sum is σ = 98167722. Its totient is φ = 98167720.

The previous prime is 98167711. The next prime is 98167759. The reversal of 98167721 is 12776189.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89965225 + 8202496 = 9485^2 + 2864^2 .

It is a cyclic number.

It is not a de Polignac number, because 98167721 - 2¹⁰ = 98166697 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (98167711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49083860 + 49083861.

It is an arithmetic number, because the mean of its divisors is an integer number (49083861).

Almost surely, 2^98167721 is an apocalyptic number.

It is an amenable number.

98167721 is a deficient number, since it is larger than the sum of its proper divisors (1).

98167721 is an equidigital number, since it uses as much as digits as its factorization.

98167721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 41.

The square root of 98167721 is about 9907.9625049755. The cubic root of 98167721 is about 461.3064952845.

The spelling of 98167721 in words is "ninety-eight million, one hundred sixty-seven thousand, seven hundred twenty-one".