90809941 has 2 divisors, whose sum is σ = 90809942. Its totient is φ = 90809940.

The previous prime is 90809893. The next prime is 90809977. The reversal of 90809941 is 14990809.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90801841 + 8100 = 9529^2 + 90^2 .

It is a cyclic number.

It is not a de Polignac number, because 90809941 - 2⁷ = 90809813 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90809894 and 90809903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90809981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45404970 + 45404971.

It is an arithmetic number, because the mean of its divisors is an integer number (45404971).

Almost surely, 2^90809941 is an apocalyptic number.

It is an amenable number.

90809941 is a deficient number, since it is larger than the sum of its proper divisors (1).

90809941 is an equidigital number, since it uses as much as digits as its factorization.

90809941 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 90809941 is about 9529.4250088869. The cubic root of 90809941 is about 449.4807855177.

The spelling of 90809941 in words is "ninety million, eight hundred nine thousand, nine hundred forty-one".