90305671 has 2 divisors, whose sum is σ = 90305672. Its totient is φ = 90305670.

The previous prime is 90305669. The next prime is 90305687. The reversal of 90305671 is 17650309.

It is a weak prime.

It is an emirp because it is prime and its reverse (17650309) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90305671 - 2¹ = 90305669 is a prime.

It is a super-2 number, since 2×90305671² = 16310228429520482, which contains 22 as substring.

Together with 90305669, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90302671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45152835 + 45152836.

It is an arithmetic number, because the mean of its divisors is an integer number (45152836).

Almost surely, 2^90305671 is an apocalyptic number.

90305671 is a deficient number, since it is larger than the sum of its proper divisors (1).

90305671 is an equidigital number, since it uses as much as digits as its factorization.

90305671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5670, while the sum is 31.

The square root of 90305671 is about 9502.9296009178. The cubic root of 90305671 is about 448.6472478331.

The spelling of 90305671 in words is "ninety million, three hundred five thousand, six hundred seventy-one".