97198649 has 2 divisors, whose sum is σ = 97198650. Its totient is φ = 97198648.

The previous prime is 97198643. The next prime is 97198657. The reversal of 97198649 is 94689179.

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., 59290000 + 37908649 = 7700^2 + 6157^2 .

It is a cyclic number.

It is not a de Polignac number, because 97198649 - 2¹² = 97194553 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 97198649.

It is not a weakly prime, because it can be changed into another prime (97198643) 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, 48599324 + 48599325.

It is an arithmetic number, because the mean of its divisors is an integer number (48599325).

Almost surely, 2^97198649 is an apocalyptic number.

It is an amenable number.

97198649 is a deficient number, since it is larger than the sum of its proper divisors (1).

97198649 is an equidigital number, since it uses as much as digits as its factorization.

97198649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 53.

The square root of 97198649 is about 9858.9375188202. The cubic root of 97198649 is about 459.7835292122.

The spelling of 97198649 in words is "ninety-seven million, one hundred ninety-eight thousand, six hundred forty-nine".