97121756159 has 2 divisors, whose sum is σ = 97121756160. Its totient is φ = 97121756158.

The previous prime is 97121756153. The next prime is 97121756191. The reversal of 97121756159 is 95165712179.

It is a weak prime.

It is an emirp because it is prime and its reverse (95165712179) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97121756159 - 2⁸ = 97121755903 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 97121756159.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97121756153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48560878079 + 48560878080.

It is an arithmetic number, because the mean of its divisors is an integer number (48560878080).

Almost surely, 2^97121756159 is an apocalyptic number.

97121756159 is a deficient number, since it is larger than the sum of its proper divisors (1).

97121756159 is an equidigital number, since it uses as much as digits as its factorization.

97121756159 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1190700, while the sum is 53.

The spelling of 97121756159 in words is "ninety-seven billion, one hundred twenty-one million, seven hundred fifty-six thousand, one hundred fifty-nine".