97839866 has 4 divisors (see below), whose sum is σ = 146759802. Its totient is φ = 48919932.

The previous prime is 97839857. The next prime is 97839869. The reversal of 97839866 is 66893879.

97839866 is nontrivially palindromic in base 14.

97839866 is an esthetic number in base 14, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 97436641 + 403225 = 9871^2 + 635^2 .

It is not an unprimeable number, because it can be changed into a prime (97839869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24459965 + ... + 24459968.

Almost surely, 2^97839866 is an apocalyptic number.

97839866 is a deficient number, since it is larger than the sum of its proper divisors (48919936).

97839866 is a wasteful number, since it uses less digits than its factorization.

97839866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48919935.

The product of its digits is 3919104, while the sum is 56.

The square root of 97839866 is about 9891.4036415465. The cubic root of 97839866 is about 460.7923740710.

The spelling of 97839866 in words is "ninety-seven million, eight hundred thirty-nine thousand, eight hundred sixty-six".