90848921 has 2 divisors, whose sum is σ = 90848922. Its totient is φ = 90848920.

The previous prime is 90848917. The next prime is 90848951. The reversal of 90848921 is 12984809.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89775625 + 1073296 = 9475^2 + 1036^2 .

It is a cyclic number.

It is not a de Polignac number, because 90848921 - 2² = 90848917 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (90848951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45424460 + 45424461.

It is an arithmetic number, because the mean of its divisors is an integer number (45424461).

Almost surely, 2^90848921 is an apocalyptic number.

It is an amenable number.

90848921 is a deficient number, since it is larger than the sum of its proper divisors (1).

90848921 is an equidigital number, since it uses as much as digits as its factorization.

90848921 is an odious number, because the sum of its binary digits is odd.

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

The square root of 90848921 is about 9531.4700335258. The cubic root of 90848921 is about 449.5450892511.

The spelling of 90848921 in words is "ninety million, eight hundred forty-eight thousand, nine hundred twenty-one".