91680698 has 4 divisors (see below), whose sum is σ = 137521050. Its totient is φ = 45840348.

The previous prime is 91680697. The next prime is 91680713. The reversal of 91680698 is 89608619.

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., 75463969 + 16216729 = 8687^2 + 4027^2 .

It is not an unprimeable number, because it can be changed into a prime (91680697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22920173 + ... + 22920176.

Almost surely, 2^91680698 is an apocalyptic number.

91680698 is a deficient number, since it is larger than the sum of its proper divisors (45840352).

91680698 is a wasteful number, since it uses less digits than its factorization.

91680698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45840351.

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 91680698 is about 9575.0038120097. The cubic root of 91680698 is about 450.9128760931.

The spelling of 91680698 in words is "ninety-one million, six hundred eighty thousand, six hundred ninety-eight".