91606719847 has 2 divisors, whose sum is σ = 91606719848. Its totient is φ = 91606719846.

The previous prime is 91606719823. The next prime is 91606719851. The reversal of 91606719847 is 74891760619.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91606719847 - 2²³ = 91598331239 is a prime.

It is a super-3 number, since 3×91606719847³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 91606719791 and 91606719800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91606719857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45803359923 + 45803359924.

It is an arithmetic number, because the mean of its divisors is an integer number (45803359924).

Almost surely, 2^91606719847 is an apocalyptic number.

91606719847 is a deficient number, since it is larger than the sum of its proper divisors (1).

91606719847 is an equidigital number, since it uses as much as digits as its factorization.

91606719847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4572288, while the sum is 58.

The spelling of 91606719847 in words is "ninety-one billion, six hundred six million, seven hundred nineteen thousand, eight hundred forty-seven".