90847 has 2 divisors, whose sum is σ = 90848. Its totient is φ = 90846.

The previous prime is 90841. The next prime is 90863. The reversal of 90847 is 74809.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90847 - 2¹¹ = 88799 is a prime.

90847 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45423 + 45424.

It is an arithmetic number, because the mean of its divisors is an integer number (45424).

2⁹⁰⁸⁴⁷ is an apocalyptic number.

90847 is a deficient number, since it is larger than the sum of its proper divisors (1).

90847 is an equidigital number, since it uses as much as digits as its factorization.

90847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 90847 is about 301.4083608661. The cubic root of 90847 is about 44.9541920686.

Subtracting from 90847 its product of nonzero digits (2016), we obtain a triangular number (88831 = T₄₂₁).

The spelling of 90847 in words is "ninety thousand, eight hundred forty-seven".