90647 has 2 divisors, whose sum is σ = 90648. Its totient is φ = 90646.

The previous prime is 90641. The next prime is 90659. The reversal of 90647 is 74609.

It is a weak prime.

It is an emirp because it is prime and its reverse (74609) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90647 - 2⁴ = 90631 is a prime.

It is equal to p₈₇₇₄ and since 90647 and 8774 have the same sum of digits, it is a Honaker prime.

It is a plaindrome in base 12.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 90647.

It is not a weakly prime, because it can be changed into another prime (90641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45323 + 45324.

It is an arithmetic number, because the mean of its divisors is an integer number (45324).

2⁹⁰⁶⁴⁷ is an apocalyptic number.

90647 is a deficient number, since it is larger than the sum of its proper divisors (1).

90647 is an equidigital number, since it uses as much as digits as its factorization.

90647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 90647 is about 301.0764022636. The cubic root of 90647 is about 44.9211788915.

It can be divided in two parts, 90 and 647, that added together give a palindrome (737).

The spelling of 90647 in words is "ninety thousand, six hundred forty-seven".