94001821 has 2 divisors, whose sum is σ = 94001822. Its totient is φ = 94001820.

The previous prime is 94001783. The next prime is 94001837. The reversal of 94001821 is 12810049.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67076100 + 26925721 = 8190^2 + 5189^2 .

It is a cyclic number.

It is not a de Polignac number, because 94001821 - 2⁷ = 94001693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (94001861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47000910 + 47000911.

It is an arithmetic number, because the mean of its divisors is an integer number (47000911).

Almost surely, 2^94001821 is an apocalyptic number.

It is an amenable number.

94001821 is a deficient number, since it is larger than the sum of its proper divisors (1).

94001821 is an equidigital number, since it uses as much as digits as its factorization.

94001821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 94001821 is about 9695.4536252823. The cubic root of 94001821 is about 454.6865304538.

The spelling of 94001821 in words is "ninety-four million, one thousand, eight hundred twenty-one".