98719997 has 2 divisors, whose sum is σ = 98719998. Its totient is φ = 98719996.

The previous prime is 98719993. The next prime is 98720009. The reversal of 98719997 is 79991789.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95374756 + 3345241 = 9766^2 + 1829^2 .

It is an emirp because it is prime and its reverse (79991789) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 98719997 - 2² = 98719993 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 (98719993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49359998 + 49359999.

It is an arithmetic number, because the mean of its divisors is an integer number (49359999).

Almost surely, 2^98719997 is an apocalyptic number.

It is an amenable number.

98719997 is a deficient number, since it is larger than the sum of its proper divisors (1).

98719997 is an equidigital number, since it uses as much as digits as its factorization.

98719997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2571912, while the sum is 59.

The square root of 98719997 is about 9935.7937277301. The cubic root of 98719997 is about 462.1699570846.

The spelling of 98719997 in words is "ninety-eight million, seven hundred nineteen thousand, nine hundred ninety-seven".