97198489 has 2 divisors, whose sum is σ = 97198490. Its totient is φ = 97198488.

The previous prime is 97198411. The next prime is 97198499. The reversal of 97198489 is 98489179.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78854400 + 18344089 = 8880^2 + 4283^2 .

It is a cyclic number.

It is not a de Polignac number, because 97198489 - 2²⁵ = 63644057 is a prime.

It is not a weakly prime, because it can be changed into another prime (97198499) 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, 48599244 + 48599245.

It is an arithmetic number, because the mean of its divisors is an integer number (48599245).

Almost surely, 2^97198489 is an apocalyptic number.

It is an amenable number.

97198489 is a deficient number, since it is larger than the sum of its proper divisors (1).

97198489 is an equidigital number, since it uses as much as digits as its factorization.

97198489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 55.

The square root of 97198489 is about 9858.9294043522. The cubic root of 97198489 is about 459.7832769268.

It can be divided in two parts, 9 and 7198489, that multiplied together give a square (64786401 = 8049²).

The spelling of 97198489 in words is "ninety-seven million, one hundred ninety-eight thousand, four hundred eighty-nine".