90942847 has 2 divisors, whose sum is σ = 90942848. Its totient is φ = 90942846.

The previous prime is 90942829. The next prime is 90942857. The reversal of 90942847 is 74824909.

It is a strong prime.

It is an emirp because it is prime and its reverse (74824909) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90942847 - 2¹¹ = 90940799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90942857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45471423 + 45471424.

It is an arithmetic number, because the mean of its divisors is an integer number (45471424).

Almost surely, 2^90942847 is an apocalyptic number.

90942847 is a deficient number, since it is larger than the sum of its proper divisors (1).

90942847 is an equidigital number, since it uses as much as digits as its factorization.

90942847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 90942847 is about 9536.3959125028. The cubic root of 90942847 is about 449.6999596615.

The spelling of 90942847 in words is "ninety million, nine hundred forty-two thousand, eight hundred forty-seven".