90047693 has 2 divisors, whose sum is σ = 90047694. Its totient is φ = 90047692.

The previous prime is 90047663. The next prime is 90047701. The reversal of 90047693 is 39674009.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69272329 + 20775364 = 8323^2 + 4558^2 .

It is an emirp because it is prime and its reverse (39674009) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90047693 - 2¹⁴ = 90031309 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90047663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45023846 + 45023847.

It is an arithmetic number, because the mean of its divisors is an integer number (45023847).

Almost surely, 2^90047693 is an apocalyptic number.

It is an amenable number.

90047693 is a deficient number, since it is larger than the sum of its proper divisors (1).

90047693 is an equidigital number, since it uses as much as digits as its factorization.

90047693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 90047693 is about 9489.3462893921. The cubic root of 90047693 is about 448.2196205424.

The spelling of 90047693 in words is "ninety million, forty-seven thousand, six hundred ninety-three".