94667821 has 2 divisors, whose sum is σ = 94667822. Its totient is φ = 94667820.

The previous prime is 94667767. The next prime is 94667827. The reversal of 94667821 is 12876649.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88566921 + 6100900 = 9411^2 + 2470^2 .

It is an emirp because it is prime and its reverse (12876649) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 94667821 - 2¹³ = 94659629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (94667827) 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, 47333910 + 47333911.

It is an arithmetic number, because the mean of its divisors is an integer number (47333911).

Almost surely, 2^94667821 is an apocalyptic number.

It is an amenable number.

94667821 is a deficient number, since it is larger than the sum of its proper divisors (1).

94667821 is an equidigital number, since it uses as much as digits as its factorization.

94667821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 43.

The square root of 94667821 is about 9729.7389995827. The cubic root of 94667821 is about 455.7578177547.

The spelling of 94667821 in words is "ninety-four million, six hundred sixty-seven thousand, eight hundred twenty-one".