97162095721 has 2 divisors, whose sum is σ = 97162095722. Its totient is φ = 97162095720.

The previous prime is 97162095707. The next prime is 97162095727. The reversal of 97162095721 is 12759026179.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72019236496 + 25142859225 = 268364^2 + 158565^2 .

It is a cyclic number.

It is not a de Polignac number, because 97162095721 - 2¹⁹ = 97161571433 is a prime.

It is not a weakly prime, because it can be changed into another prime (97162095727) 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, 48581047860 + 48581047861.

It is an arithmetic number, because the mean of its divisors is an integer number (48581047861).

Almost surely, 2^97162095721 is an apocalyptic number.

It is an amenable number.

97162095721 is a deficient number, since it is larger than the sum of its proper divisors (1).

97162095721 is an equidigital number, since it uses as much as digits as its factorization.

97162095721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 476280, while the sum is 49.

The spelling of 97162095721 in words is "ninety-seven billion, one hundred sixty-two million, ninety-five thousand, seven hundred twenty-one".