94407581 has 2 divisors, whose sum is σ = 94407582. Its totient is φ = 94407580.

The previous prime is 94407569. The next prime is 94407583. The reversal of 94407581 is 18570449.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47265625 + 47141956 = 6875^2 + 6866^2 .

It is an emirp because it is prime and its reverse (18570449) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 94407581 - 2²⁶ = 27298717 is a prime.

It is a super-2 number, since 2×94407581² = 17825582700543122, which contains 22 as substring.

Together with 94407583, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (94407583) 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, 47203790 + 47203791.

It is an arithmetic number, because the mean of its divisors is an integer number (47203791).

Almost surely, 2^94407581 is an apocalyptic number.

It is an amenable number.

94407581 is a deficient number, since it is larger than the sum of its proper divisors (1).

94407581 is an equidigital number, since it uses as much as digits as its factorization.

94407581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 94407581 is about 9716.3563643992. The cubic root of 94407581 is about 455.3398113622.

The spelling of 94407581 in words is "ninety-four million, four hundred seven thousand, five hundred eighty-one".