71286091 has 2 divisors, whose sum is σ = 71286092. Its totient is φ = 71286090.

The previous prime is 71286067. The next prime is 71286133. The reversal of 71286091 is 19068217.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71286091 - 2¹⁵ = 71253323 is a prime.

It is not a weakly prime, because it can be changed into another prime (71286041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35643045 + 35643046.

It is an arithmetic number, because the mean of its divisors is an integer number (35643046).

Almost surely, 2^71286091 is an apocalyptic number.

71286091 is a deficient number, since it is larger than the sum of its proper divisors (1).

71286091 is an equidigital number, since it uses as much as digits as its factorization.

71286091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 71286091 is about 8443.1090837440. The cubic root of 71286091 is about 414.6372036180.

The spelling of 71286091 in words is "seventy-one million, two hundred eighty-six thousand, ninety-one".