7135680091 has 2 divisors, whose sum is σ = 7135680092. Its totient is φ = 7135680090.

The previous prime is 7135680089. The next prime is 7135680121. The reversal of 7135680091 is 1900865317.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7135680091 - 2¹ = 7135680089 is a prime.

It is a super-2 number, since 2×7135680091² (a number of 21 digits) contains 22 as substring.

Together with 7135680089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (7135680061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3567840045 + 3567840046.

It is an arithmetic number, because the mean of its divisors is an integer number (3567840046).

Almost surely, 2^7135680091 is an apocalyptic number.

7135680091 is a deficient number, since it is larger than the sum of its proper divisors (1).

7135680091 is an equidigital number, since it uses as much as digits as its factorization.

7135680091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 7135680091 is about 84472.9547902759. The cubic root of 7135680091 is about 1925.2115439415.

The spelling of 7135680091 in words is "seven billion, one hundred thirty-five million, six hundred eighty thousand, ninety-one".