90084539 has 2 divisors, whose sum is σ = 90084540. Its totient is φ = 90084538.

The previous prime is 90084517. The next prime is 90084593. The reversal of 90084539 is 93548009.

Together with next prime (90084593) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (93548009) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90084539 - 2²⁰ = 89035963 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (90084509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45042269 + 45042270.

It is an arithmetic number, because the mean of its divisors is an integer number (45042270).

Almost surely, 2^90084539 is an apocalyptic number.

90084539 is a deficient number, since it is larger than the sum of its proper divisors (1).

90084539 is an equidigital number, since it uses as much as digits as its factorization.

90084539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 90084539 is about 9491.2875312046. The cubic root of 90084539 is about 448.2807468468.

The spelling of 90084539 in words is "ninety million, eighty-four thousand, five hundred thirty-nine".