73071091 has 2 divisors, whose sum is σ = 73071092. Its totient is φ = 73071090.

The previous prime is 73071077. The next prime is 73071109. The reversal of 73071091 is 19017037.

It is a happy number.

Together with next prime (73071109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73071091 is a prime.

It is not a weakly prime, because it can be changed into another prime (73071191) 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, 36535545 + 36535546.

It is an arithmetic number, because the mean of its divisors is an integer number (36535546).

Almost surely, 2^73071091 is an apocalyptic number.

73071091 is a deficient number, since it is larger than the sum of its proper divisors (1).

73071091 is an equidigital number, since it uses as much as digits as its factorization.

73071091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1323, while the sum is 28.

The square root of 73071091 is about 8548.1630190351. The cubic root of 73071091 is about 418.0695438423.

The spelling of 73071091 in words is "seventy-three million, seventy-one thousand, ninety-one".