98619797 has 2 divisors, whose sum is σ = 98619798. Its totient is φ = 98619796.

The previous prime is 98619793. The next prime is 98619799. The reversal of 98619797 is 79791689.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98227921 + 391876 = 9911^2 + 626^2 .

It is an emirp because it is prime and its reverse (79791689) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 98619797 - 2² = 98619793 is a prime.

Together with 98619799, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98619793) 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, 49309898 + 49309899.

It is an arithmetic number, because the mean of its divisors is an integer number (49309899).

Almost surely, 2^98619797 is an apocalyptic number.

It is an amenable number.

98619797 is a deficient number, since it is larger than the sum of its proper divisors (1).

98619797 is an equidigital number, since it uses as much as digits as its factorization.

98619797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1714608, while the sum is 56.

The square root of 98619797 is about 9930.7500723762. The cubic root of 98619797 is about 462.0135378928.

The spelling of 98619797 in words is "ninety-eight million, six hundred nineteen thousand, seven hundred ninety-seven".