90986239 has 2 divisors, whose sum is σ = 90986240. Its totient is φ = 90986238.

The previous prime is 90986173. The next prime is 90986249. The reversal of 90986239 is 93268909.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (93268909) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90986239 - 2¹³ = 90978047 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90986249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45493119 + 45493120.

It is an arithmetic number, because the mean of its divisors is an integer number (45493120).

Almost surely, 2^90986239 is an apocalyptic number.

90986239 is a deficient number, since it is larger than the sum of its proper divisors (1).

90986239 is an equidigital number, since it uses as much as digits as its factorization.

90986239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 46.

The square root of 90986239 is about 9538.6707145178. The cubic root of 90986239 is about 449.7714707940.

The spelling of 90986239 in words is "ninety million, nine hundred eighty-six thousand, two hundred thirty-nine".