94290821 has 2 divisors, whose sum is σ = 94290822. Its totient is φ = 94290820.

The previous prime is 94290751. The next prime is 94290839. The reversal of 94290821 is 12809249.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68392900 + 25897921 = 8270^2 + 5089^2 .

It is a cyclic number.

It is not a de Polignac number, because 94290821 - 2¹⁴ = 94274437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (94290841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47145410 + 47145411.

It is an arithmetic number, because the mean of its divisors is an integer number (47145411).

Almost surely, 2^94290821 is an apocalyptic number.

It is an amenable number.

94290821 is a deficient number, since it is larger than the sum of its proper divisors (1).

94290821 is an equidigital number, since it uses as much as digits as its factorization.

94290821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 94290821 is about 9710.3460803413. The cubic root of 94290821 is about 455.1520177952.

The spelling of 94290821 in words is "ninety-four million, two hundred ninety thousand, eight hundred twenty-one".