91680403 has 8 divisors (see below), whose sum is σ = 93401568. Its totient is φ = 89975424.

The previous prime is 91680373. The next prime is 91680437. The reversal of 91680403 is 30408619.

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 91680403 - 2²⁵ = 58125971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91680443) 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 in 7 ways as a sum of consecutive naturals, for example, 7701 + ... + 15577.

It is an arithmetic number, because the mean of its divisors is an integer number (11675196).

Almost surely, 2^91680403 is an apocalyptic number.

91680403 is a deficient number, since it is larger than the sum of its proper divisors (1721165).

91680403 is a wasteful number, since it uses less digits than its factorization.

91680403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8093.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 91680403 is about 9574.9884073037. The cubic root of 91680403 is about 450.9123924600.

The spelling of 91680403 in words is "ninety-one million, six hundred eighty thousand, four hundred three".