97665563 has 2 divisors, whose sum is σ = 97665564. Its totient is φ = 97665562.

The previous prime is 97665551. The next prime is 97665571. The reversal of 97665563 is 36556679.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 97665563 - 2⁶ = 97665499 is a prime.

It is a super-2 number, since 2×97665563² = 19077124392213938, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (97665583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48832781 + 48832782.

It is an arithmetic number, because the mean of its divisors is an integer number (48832782).

Almost surely, 2^97665563 is an apocalyptic number.

97665563 is a deficient number, since it is larger than the sum of its proper divisors (1).

97665563 is an equidigital number, since it uses as much as digits as its factorization.

97665563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1020600, while the sum is 47.

The square root of 97665563 is about 9882.5888814622. The cubic root of 97665563 is about 460.5185755358.

The spelling of 97665563 in words is "ninety-seven million, six hundred sixty-five thousand, five hundred sixty-three".