71100091 has 2 divisors, whose sum is σ = 71100092. Its totient is φ = 71100090.

The previous prime is 71100077. The next prime is 71100097. The reversal of 71100091 is 19000117.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71100091 - 2¹¹ = 71098043 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71100097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35550045 + 35550046.

It is an arithmetic number, because the mean of its divisors is an integer number (35550046).

Almost surely, 2^71100091 is an apocalyptic number.

71100091 is a deficient number, since it is larger than the sum of its proper divisors (1).

71100091 is an equidigital number, since it uses as much as digits as its factorization.

71100091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63, while the sum is 19.

The square root of 71100091 is about 8432.0869895892. The cubic root of 71100091 is about 414.2762650752.

It can be divided in two parts, 711000 and 91, that multiplied together give a triangular number (64701000 = T₁₁₃₇₅).

The spelling of 71100091 in words is "seventy-one million, one hundred thousand, ninety-one".