97821965698927 has 2 divisors, whose sum is σ = 97821965698928. Its totient is φ = 97821965698926.

The previous prime is 97821965698903. The next prime is 97821965698931. The reversal of 97821965698927 is 72989656912879.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97821965698927 is a prime.

It is a super-3 number, since 3×97821965698927³ (a number of 43 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97821965698027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48910982849463 + 48910982849464.

It is an arithmetic number, because the mean of its divisors is an integer number (48910982849464).

Almost surely, 2^{97821965698927} is an apocalyptic number.

97821965698927 is a deficient number, since it is larger than the sum of its proper divisors (1).

97821965698927 is an equidigital number, since it uses as much as digits as its factorization.

97821965698927 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14814213120, while the sum is 88.

The spelling of 97821965698927 in words is "ninety-seven trillion, eight hundred twenty-one billion, nine hundred sixty-five million, six hundred ninety-eight thousand, nine hundred twenty-seven".