97921073 has 2 divisors, whose sum is σ = 97921074. Its totient is φ = 97921072.

The previous prime is 97921067. The next prime is 97921099. The reversal of 97921073 is 37012979.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66471409 + 31449664 = 8153^2 + 5608^2 .

It is an emirp because it is prime and its reverse (37012979) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97921073 - 2⁶ = 97921009 is a prime.

It is not a weakly prime, because it can be changed into another prime (97921673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48960536 + 48960537.

It is an arithmetic number, because the mean of its divisors is an integer number (48960537).

Almost surely, 2^97921073 is an apocalyptic number.

It is an amenable number.

97921073 is a deficient number, since it is larger than the sum of its proper divisors (1).

97921073 is an equidigital number, since it uses as much as digits as its factorization.

97921073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23814, while the sum is 38.

The square root of 97921073 is about 9895.5077181517. The cubic root of 97921073 is about 460.9198245671.

The spelling of 97921073 in words is "ninety-seven million, nine hundred twenty-one thousand, seventy-three".