97818143 has 2 divisors, whose sum is σ = 97818144. Its totient is φ = 97818142.

The previous prime is 97818109. The next prime is 97818151. The reversal of 97818143 is 34181879.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 97818143 - 2⁸ = 97817887 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 97818143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97811143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48909071 + 48909072.

It is an arithmetic number, because the mean of its divisors is an integer number (48909072).

Almost surely, 2^97818143 is an apocalyptic number.

97818143 is a deficient number, since it is larger than the sum of its proper divisors (1).

97818143 is an equidigital number, since it uses as much as digits as its factorization.

97818143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 41.

The square root of 97818143 is about 9890.3055058982. The cubic root of 97818143 is about 460.7582689083.

The spelling of 97818143 in words is "ninety-seven million, eight hundred eighteen thousand, one hundred forty-three".