97130921 has 2 divisors, whose sum is σ = 97130922. Its totient is φ = 97130920.

The previous prime is 97130861. The next prime is 97130923. The reversal of 97130921 is 12903179.

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., 58690921 + 38440000 = 7661^2 + 6200^2 .

It is an emirp because it is prime and its reverse (12903179) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97130921 - 2⁶ = 97130857 is a prime.

Together with 97130923, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (97130923) 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, 48565460 + 48565461.

It is an arithmetic number, because the mean of its divisors is an integer number (48565461).

Almost surely, 2^97130921 is an apocalyptic number.

It is an amenable number.

97130921 is a deficient number, since it is larger than the sum of its proper divisors (1).

97130921 is an equidigital number, since it uses as much as digits as its factorization.

97130921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 97130921 is about 9855.5020673733. The cubic root of 97130921 is about 459.6767120399.

The spelling of 97130921 in words is "ninety-seven million, one hundred thirty thousand, nine hundred twenty-one".