91106948047 has 2 divisors, whose sum is σ = 91106948048. Its totient is φ = 91106948046.

The previous prime is 91106948033. The next prime is 91106948057. The reversal of 91106948047 is 74084960119.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91106948047 is a prime.

It is a super-2 number, since 2×91106948047² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91106948027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45553474023 + 45553474024.

It is an arithmetic number, because the mean of its divisors is an integer number (45553474024).

Almost surely, 2^91106948047 is an apocalyptic number.

91106948047 is a deficient number, since it is larger than the sum of its proper divisors (1).

91106948047 is an equidigital number, since it uses as much as digits as its factorization.

91106948047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 49.

The spelling of 91106948047 in words is "ninety-one billion, one hundred six million, nine hundred forty-eight thousand, forty-seven".