91206597047 has 12 divisors (see below), whose sum is σ = 97340231880. Its totient is φ = 85222507968.

The previous prime is 91206597019. The next prime is 91206597101. The reversal of 91206597047 is 74079560219.

It is not a de Polignac number, because 91206597047 - 2¹⁸ = 91206334903 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91206596986 and 91206597004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91206593047) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 349148 + ... + 551649.

It is an arithmetic number, because the mean of its divisors is an integer number (8111685990).

Almost surely, 2^91206597047 is an apocalyptic number.

91206597047 is a deficient number, since it is larger than the sum of its proper divisors (6133634833).

91206597047 is an equidigital number, since it uses as much as digits as its factorization.

91206597047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900962 (or 900889 counting only the distinct ones).

The product of its (nonzero) digits is 952560, while the sum is 50.

The spelling of 91206597047 in words is "ninety-one billion, two hundred six million, five hundred ninety-seven thousand, forty-seven".