91141993 has 8 divisors (see below), whose sum is σ = 96048000. Its totient is φ = 86246928.

The previous prime is 91141951. The next prime is 91142003. The reversal of 91141993 is 39914119.

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

It is not a de Polignac number, because 91141993 - 2⁹ = 91141481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91141903) 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, 18783 + ... + 23131.

It is an arithmetic number, because the mean of its divisors is an integer number (12006000).

Almost surely, 2^91141993 is an apocalyptic number.

It is an amenable number.

91141993 is a deficient number, since it is larger than the sum of its proper divisors (4906007).

91141993 is a wasteful number, since it uses less digits than its factorization.

91141993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5471.

The product of its digits is 8748, while the sum is 37.

The square root of 91141993 is about 9546.8315686410. The cubic root of 91141993 is about 450.0279702779.

The spelling of 91141993 in words is "ninety-one million, one hundred forty-one thousand, nine hundred ninety-three".