94809821 has 4 divisors (see below), whose sum is σ = 95952192. Its totient is φ = 93667452.

The previous prime is 94809751. The next prime is 94809853. The reversal of 94809821 is 12890849.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 94809821 - 2¹⁴ = 94793437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (94809521) 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 in 3 ways as a sum of consecutive naturals, for example, 571061 + ... + 571226.

It is an arithmetic number, because the mean of its divisors is an integer number (23988048).

Almost surely, 2^94809821 is an apocalyptic number.

It is an amenable number.

94809821 is a deficient number, since it is larger than the sum of its proper divisors (1142371).

94809821 is a wasteful number, since it uses less digits than its factorization.

94809821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1142370.

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 94809821 is about 9737.0334804806. The cubic root of 94809821 is about 455.9855800431.

The spelling of 94809821 in words is "ninety-four million, eight hundred nine thousand, eight hundred twenty-one".