91719793 has 8 divisors (see below), whose sum is σ = 103286016. Its totient is φ = 80691600.

The previous prime is 91719763. The next prime is 91719827. The reversal of 91719793 is 39791719.

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

It is not a de Polignac number, because 91719793 - 2⁹ = 91719281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91719703) 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, 134146 + ... + 134827.

It is an arithmetic number, because the mean of its divisors is an integer number (12910752).

Almost surely, 2^91719793 is an apocalyptic number.

It is an amenable number.

91719793 is a deficient number, since it is larger than the sum of its proper divisors (11566223).

91719793 is a wasteful number, since it uses less digits than its factorization.

91719793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269015.

The product of its digits is 107163, while the sum is 46.

The square root of 91719793 is about 9577.0451079652. The cubic root of 91719793 is about 450.9769605882.

The spelling of 91719793 in words is "ninety-one million, seven hundred nineteen thousand, seven hundred ninety-three".