91720294443127 has 8 divisors (see below), whose sum is σ = 110989263864096. Its totient is φ = 73992842575872.

The previous prime is 91720294443101. The next prime is 91720294443131. The reversal of 91720294443127 is 72134449202719.

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 not a de Polignac number, because 91720294443127 - 2⁷ = 91720294442999 is a prime.

It is a super-2 number, since 2×91720294443127² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91720294447127) 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, 385379388298 + ... + 385379388535.

It is an arithmetic number, because the mean of its divisors is an integer number (13873657983012).

Almost surely, 2^{91720294443127} is an apocalyptic number.

91720294443127 is a deficient number, since it is larger than the sum of its proper divisors (19268969420969).

91720294443127 is a wasteful number, since it uses less digits than its factorization.

91720294443127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770758776857.

The product of its (nonzero) digits is 6096384, while the sum is 55.

The spelling of 91720294443127 in words is "ninety-one trillion, seven hundred twenty billion, two hundred ninety-four million, four hundred forty-three thousand, one hundred twenty-seven".