91000759091 has 8 divisors (see below), whose sum is σ = 99828158400. Its totient is φ = 82265793640.

The previous prime is 91000759081. The next prime is 91000759111. The reversal of 91000759091 is 19095700019.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91000759091 is a prime.

It is a super-2 number, since 2×91000759091² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91000759051) 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, 23106401 + ... + 23110338.

It is an arithmetic number, because the mean of its divisors is an integer number (12478519800).

Almost surely, 2^91000759091 is an apocalyptic number.

91000759091 is a deficient number, since it is larger than the sum of its proper divisors (8827399309).

91000759091 is a wasteful number, since it uses less digits than its factorization.

91000759091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46216929.

The product of its (nonzero) digits is 25515, while the sum is 41.

The spelling of 91000759091 in words is "ninety-one billion, seven hundred fifty-nine thousand, ninety-one".