94872821 has 4 divisors (see below), whose sum is σ = 95117100. Its totient is φ = 94628544.

The previous prime is 94872787. The next prime is 94872829. The reversal of 94872821 is 12827849.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 33814225 + 61058596 = 5815^2 + 7814^2 .

It is a cyclic number.

It is not a de Polignac number, because 94872821 - 2¹⁰ = 94871797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (94872829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121556 + ... + 122333.

It is an arithmetic number, because the mean of its divisors is an integer number (23779275).

Almost surely, 2^94872821 is an apocalyptic number.

It is an amenable number.

94872821 is a deficient number, since it is larger than the sum of its proper divisors (244279).

94872821 is a wasteful number, since it uses less digits than its factorization.

94872821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244278.

The product of its digits is 64512, while the sum is 41.

The square root of 94872821 is about 9740.2680147930. The cubic root of 94872821 is about 456.0865566812.

The spelling of 94872821 in words is "ninety-four million, eight hundred seventy-two thousand, eight hundred twenty-one".