97656289 has 2 divisors, whose sum is σ = 97656290. Its totient is φ = 97656288.

The previous prime is 97656277. The next prime is 97656329. The reversal of 97656289 is 98265679.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95648400 + 2007889 = 9780^2 + 1417^2 .

It is a cyclic number.

It is not a de Polignac number, because 97656289 - 2¹¹ = 97654241 is a prime.

It is not a weakly prime, because it can be changed into another prime (97656589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48828144 + 48828145.

It is an arithmetic number, because the mean of its divisors is an integer number (48828145).

Almost surely, 2^97656289 is an apocalyptic number.

It is an amenable number.

97656289 is a deficient number, since it is larger than the sum of its proper divisors (1).

97656289 is an equidigital number, since it uses as much as digits as its factorization.

97656289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 52.

The square root of 97656289 is about 9882.1196612872. The cubic root of 97656289 is about 460.5039986323.

It can be divided in two parts, 9 and 7656289, that multiplied together give a square (68906601 = 8301²).

The spelling of 97656289 in words is "ninety-seven million, six hundred fifty-six thousand, two hundred eighty-nine".