71061091 has 2 divisors, whose sum is σ = 71061092. Its totient is φ = 71061090.

The previous prime is 71061079. The next prime is 71061097. The reversal of 71061091 is 19016017.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71061091 - 2⁷ = 71060963 is a prime.

It is a super-2 number, since 2×71061091² = 10099357308220562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71061097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35530545 + 35530546.

It is an arithmetic number, because the mean of its divisors is an integer number (35530546).

Almost surely, 2^71061091 is an apocalyptic number.

71061091 is a deficient number, since it is larger than the sum of its proper divisors (1).

71061091 is an equidigital number, since it uses as much as digits as its factorization.

71061091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 25.

The square root of 71061091 is about 8429.7740776370. The cubic root of 71061091 is about 414.2005046033.

The spelling of 71061091 in words is "seventy-one million, sixty-one thousand, ninety-one".