90086393 has 2 divisors, whose sum is σ = 90086394. Its totient is φ = 90086392.

The previous prime is 90086371. The next prime is 90086401. The reversal of 90086393 is 39368009.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73136704 + 16949689 = 8552^2 + 4117^2 .

It is a cyclic number.

It is not a de Polignac number, because 90086393 - 2¹⁴ = 90070009 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (90086363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45043196 + 45043197.

It is an arithmetic number, because the mean of its divisors is an integer number (45043197).

Almost surely, 2^90086393 is an apocalyptic number.

It is an amenable number.

90086393 is a deficient number, since it is larger than the sum of its proper divisors (1).

90086393 is an equidigital number, since it uses as much as digits as its factorization.

90086393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 90086393 is about 9491.3851992214. The cubic root of 90086393 is about 448.2838221315.

The spelling of 90086393 in words is "ninety million, eighty-six thousand, three hundred ninety-three".