91680699 has 8 divisors (see below), whose sum is σ = 133353792. Its totient is φ = 55564040.

The previous prime is 91680697. The next prime is 91680713. The reversal of 91680699 is 99608619.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91680699 - 2¹ = 91680697 is a prime.

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1389069 + ... + 1389134.

It is an arithmetic number, because the mean of its divisors is an integer number (16669224).

Almost surely, 2^91680699 is an apocalyptic number.

91680699 is a deficient number, since it is larger than the sum of its proper divisors (41673093).

91680699 is a wasteful number, since it uses less digits than its factorization.

91680699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2778217.

The product of its (nonzero) digits is 209952, while the sum is 48.

The square root of 91680699 is about 9575.0038642290. The cubic root of 91680699 is about 450.9128777325.

The spelling of 91680699 in words is "ninety-one million, six hundred eighty thousand, six hundred ninety-nine".