91439089321 has 8 divisors (see below), whose sum is σ = 91500192000. Its totient is φ = 91378013760.

The previous prime is 91439089267. The next prime is 91439089349. The reversal of 91439089321 is 12398093419.

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 91439089321 - 2⁷ = 91439089193 is a prime.

It is a super-2 number, since 2×91439089321² (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 (91439089351) 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, 18586500 + ... + 18591418.

It is an arithmetic number, because the mean of its divisors is an integer number (11437524000).

Almost surely, 2^91439089321 is an apocalyptic number.

It is an amenable number.

91439089321 is a deficient number, since it is larger than the sum of its proper divisors (61102679).

91439089321 is a wasteful number, since it uses less digits than its factorization.

91439089321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13559.

The product of its (nonzero) digits is 419904, while the sum is 49.

The spelling of 91439089321 in words is "ninety-one billion, four hundred thirty-nine million, eighty-nine thousand, three hundred twenty-one".