97688779 has 2 divisors, whose sum is σ = 97688780. Its totient is φ = 97688778.

The previous prime is 97688771. The next prime is 97688827. The reversal of 97688779 is 97788679.

It is a weak prime.

It is an emirp because it is prime and its reverse (97788679) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97688779 - 2³ = 97688771 is a prime.

It is not a weakly prime, because it can be changed into another prime (97688771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48844389 + 48844390.

It is an arithmetic number, because the mean of its divisors is an integer number (48844390).

Almost surely, 2^97688779 is an apocalyptic number.

97688779 is a deficient number, since it is larger than the sum of its proper divisors (1).

97688779 is an equidigital number, since it uses as much as digits as its factorization.

97688779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10668672, while the sum is 61.

The square root of 97688779 is about 9883.7634026721. The cubic root of 97688779 is about 460.5550624745. Note that the first 3 decimals are identical.

The spelling of 97688779 in words is "ninety-seven million, six hundred eighty-eight thousand, seven hundred seventy-nine".