98892721 has 2 divisors, whose sum is σ = 98892722. Its totient is φ = 98892720.

The previous prime is 98892719. The next prime is 98892727. The reversal of 98892721 is 12729889.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96040000 + 2852721 = 9800^2 + 1689^2 .

It is a cyclic number.

It is not a de Polignac number, because 98892721 - 2¹ = 98892719 is a prime.

Together with 98892719, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (98892727) 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, 49446360 + 49446361.

It is an arithmetic number, because the mean of its divisors is an integer number (49446361).

Almost surely, 2^98892721 is an apocalyptic number.

It is an amenable number.

98892721 is a deficient number, since it is larger than the sum of its proper divisors (1).

98892721 is an equidigital number, since it uses as much as digits as its factorization.

98892721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 46.

The square root of 98892721 is about 9944.4819372353. The cubic root of 98892721 is about 462.4393430069.

The spelling of 98892721 in words is "ninety-eight million, eight hundred ninety-two thousand, seven hundred twenty-one".