97798249 has 2 divisors, whose sum is σ = 97798250. Its totient is φ = 97798248.

The previous prime is 97798247. The next prime is 97798271. The reversal of 97798249 is 94289779.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58798224 + 39000025 = 7668^2 + 6245^2 .

It is an emirp because it is prime and its reverse (94289779) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97798249 - 2¹ = 97798247 is a prime.

Together with 97798247, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 97798249.

It is not a weakly prime, because it can be changed into another prime (97798241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48899124 + 48899125.

It is an arithmetic number, because the mean of its divisors is an integer number (48899125).

Almost surely, 2^97798249 is an apocalyptic number.

It is an amenable number.

97798249 is a deficient number, since it is larger than the sum of its proper divisors (1).

97798249 is an equidigital number, since it uses as much as digits as its factorization.

97798249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2286144, while the sum is 55.

The square root of 97798249 is about 9889.2997224273. The cubic root of 97798249 is about 460.7270308503.

The spelling of 97798249 in words is "ninety-seven million, seven hundred ninety-eight thousand, two hundred forty-nine".