91408288393 has 8 divisors (see below), whose sum is σ = 96276118400. Its totient is φ = 86546145168.

The previous prime is 91408288381. The next prime is 91408288399. The reversal of 91408288393 is 39388280419.

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

It is a de Polignac number, because none of the positive numbers 2^k-91408288393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91408288399) 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, 1388673 + ... + 1453006.

It is an arithmetic number, because the mean of its divisors is an integer number (12034514800).

Almost surely, 2^91408288393 is an apocalyptic number.

It is an amenable number.

91408288393 is a deficient number, since it is larger than the sum of its proper divisors (4867830007).

91408288393 is a wasteful number, since it uses less digits than its factorization.

91408288393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2843391.

The product of its (nonzero) digits is 2985984, while the sum is 55.

The spelling of 91408288393 in words is "ninety-one billion, four hundred eight million, two hundred eighty-eight thousand, three hundred ninety-three".