9791000610091 has 2 divisors, whose sum is σ = 9791000610092. Its totient is φ = 9791000610090.

The previous prime is 9791000610071. The next prime is 9791000610113. The reversal of 9791000610091 is 1900160001979.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (1900160001979) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9791000610091 - 2⁵ = 9791000610059 is a prime.

It is a super-2 number, since 2×9791000610091² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9791000610071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4895500305045 + 4895500305046.

It is an arithmetic number, because the mean of its divisors is an integer number (4895500305046).

Almost surely, 2^{9791000610091} is an apocalyptic number.

9791000610091 is a deficient number, since it is larger than the sum of its proper divisors (1).

9791000610091 is an equidigital number, since it uses as much as digits as its factorization.

9791000610091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30618, while the sum is 43.

The spelling of 9791000610091 in words is "nine trillion, seven hundred ninety-one billion, six hundred ten thousand, ninety-one".