97980257 has 2 divisors, whose sum is σ = 97980258. Its totient is φ = 97980256.

The previous prime is 97980229. The next prime is 97980263. The reversal of 97980257 is 75208979.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51208336 + 46771921 = 7156^2 + 6839^2 .

It is a cyclic number.

It is not a de Polignac number, because 97980257 - 2⁶ = 97980193 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (97980277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48990128 + 48990129.

It is an arithmetic number, because the mean of its divisors is an integer number (48990129).

Almost surely, 2^97980257 is an apocalyptic number.

It is an amenable number.

97980257 is a deficient number, since it is larger than the sum of its proper divisors (1).

97980257 is an equidigital number, since it uses as much as digits as its factorization.

97980257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 317520, while the sum is 47.

The square root of 97980257 is about 9898.4977142999. The cubic root of 97980257 is about 461.0126666355.

The spelling of 97980257 in words is "ninety-seven million, nine hundred eighty thousand, two hundred fifty-seven".