94391009 has 2 divisors, whose sum is σ = 94391010. Its totient is φ = 94391008.

The previous prime is 94390999. The next prime is 94391023. The reversal of 94391009 is 90019349.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72301009 + 22090000 = 8503^2 + 4700^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-94391009 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 94391009.

It is not a weakly prime, because it can be changed into another prime (94391509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47195504 + 47195505.

It is an arithmetic number, because the mean of its divisors is an integer number (47195505).

Almost surely, 2^94391009 is an apocalyptic number.

It is an amenable number.

94391009 is a deficient number, since it is larger than the sum of its proper divisors (1).

94391009 is an equidigital number, since it uses as much as digits as its factorization.

94391009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 94391009 is about 9715.5035381600. The cubic root of 94391009 is about 455.3131668462.

The spelling of 94391009 in words is "ninety-four million, three hundred ninety-one thousand, nine".